How Understanding The Usefulness Of GFO Can Help You Improve Your Aquarium

How Understanding The Usefulness Of GFO Can Help You Improve Your Aquarium

GFO stands for granular ferric oxide, and those who are starting with an aquarium may have heard that this chemical can be used to prevent the growth of algae in reef tanks.


GFO works by removing phosphates from the water column. If done correctly, it can be beneficial at hindering algae growth. However, beginner reefers need to understand that there are a few things you need to pay attention to, to get it right and not cause any accidental damage to your tank.


Why are algae harmful in an aquarium?


Some algae growth is positive in an aquarium as it helps to stop dangerous levels of nitrogen having a toxic effect on the life forms that live within it. However, too much of a good thing, unfortunately, holds true when it comes to the presence of algae in an aquarium as when it dies it releases the nitrogen back into the water.


GFO – how should it be used?


Using GFO to support a healthy aquatic system is a smart move. The easiest, and perhaps most obvious piece of advice is to make sure you read the instructions on how to use it as these may differ from product to product. However, some general tips can help ensure GFO in your tank is as effective as possible. These include:
Rinsing the GFO before use until it is clear.


Ensuring that you pour the recommended amount into the media bag and that the bag is fully secure before putting it in your tank.


Using common sense when changing the granular ferric oxide. While most products recommend changing between 4 – 8 weeks, if you notice algae levels on the rise, do it sooner.


Use a phosphate test kit to measure phosphate levels in your aquarium.


Make sure you place the media bag in a location of your sump / back chamber where the water flow is robust.


Should you use a media reactor?


A media reactor is likely to be the most effective way of releasing GFO into your tank. If you decide to use one, you first need to flush the line. To do this make sure that the return line for the reactor is placed in a bowl/bucket or your sink and turn on the feed pump. Wait until the water runs clear.


Once this has been done, you can place the media reactor in your tank and then change the flow so that the GFO is only very lightly rumbling onto the surface. If it tumbles too vigorously the water will go cloudy, so make sure you monitor this carefully to avoid adding too much.


Where you place the media reactor is crucial, ensuring that the pump of the reactor is apart from the skimmer’s pump. Ideally, set it into the return section of the sump while still leaving ample room for the effluent, so you avoid re-treating the same water twice.


Can you regenerate GFO?


More experienced reefers may wish to try regenerating GFO, but it is essential to emphasise that if you don’t do this properly your aquarium could suffer severely as a consequence. Remember, you are dealing with potentially hazardous chemicals, and therefore, proper care and precautions should always be taken.


Can GFO treat Cyano?


If you’ve noticed red algae growing in your tank, this is likely to be Cyano, and while GFO can help to reduce the levels of it and slow growth, you may find that GFO alone won’t be able to keep it under control. To tackle this problem, it’s advisable to first vacuum out as much of the red algae as possible, increase water changes and consider a water filter system such as SpectraPure to help reduce the amount of Cyano in the tank. A combination of high strength GFO and bio-pellets is usually very effective.


Should I use granular ferric oxide and carbon simultaneously?


You may have heard warnings that GFO and carbon shouldn’t be used in the same reactor, but they actually are designed to complement one another, and carbon will ensure that the GFO doesn’t bind together. Carbon does, however, need changing more frequently than GFO, so to get around this separate the two using the sponge that comes included with the reactor.


GFO – it’s all about the levels


Getting the levels of GFO in your aquarium right is important. If you put too little in it won’t be effective at reducing the algae, however, if you put too much in you could decrease the levels go phosphate too much, causing the alkalinity in your water to drop significantly.


Creating the perfect habitat for your coral takes time and practice, however using GFO correctly is so worth it. Use the above as a guide, take your time, and you’ll be glad that you did.


If you are looking for stunning coral frags for your aquarium check out our shop, or if you have any questions about how to get the most out of your tank, contact us using the contact form, and we’ll get back to you as soon as possible.

  • ocean king thunder dragon

    27 March 2020at3:20 pm

    This is a topic which is near to my heart… Thank you!

    Where are your contact details though?

  • ormekur kat håndkøb

    27 March 2020at4:32 pm

    We’re a group of volunteers and opening a new scheme in our community.
    Your website offered us with valuable information to work on. You
    have done a formidable job and our whole community will be thankful to you.

  • w88

    27 March 2020at6:53 pm

    If some one needs to be updated with newest technologies after that he
    must be pay a visit this web site and be up to
    date every day.

  • wayne hotel vegas

    27 March 2020at6:57 pm

    you’re in reality a just right webmaster. The website loading speed is
    incredible. It sort of feels that you’re doing any unique trick.
    In addition, The contents are masterwork. you have done a wonderful activity in this matter!

  • situs judi online,

    27 March 2020at9:51 pm

    Ηellօ to all, hoᴡ iѕ everything, I think every one
    is getting morе from this web рage, and yoսr visws aree fastidious
    designed fⲟr neew people.

  • Billig hundekurv

    27 March 2020at9:59 pm

    Thanks for the good writeup. It actually
    was once a entertainment account it. Look complicated to far
    introduced agreeable from you! By the way, how can we
    keep up a correspondence?

  • w88

    27 March 2020at10:57 pm

    Your mode of explaining the whole thing in this post is actually pleasant, all can without difficulty know it, Thanks a lot.

  • situs pkv games id pro

    28 March 2020at12:14 am

    With havin so much content and articles do you ever run into any problems of plagorism or copyright
    violation? My blog has a lot of unique content I’ve either written myself
    or outsourced but it looks like a lot of it is popping it up all over
    the internet without my authorization. Do you know any ways to help stop content
    from being stolen? I’d really appreciate it.

  • Quảng cáo sân bay

    28 March 2020at9:03 am

    Nay công ty chúng tôi trân trọng gửi đến Quý công ty Báo giá Quảng
    cáo sân bay Tân Sơn Nhất tại ga Quốc Nội các vị trí và các
    hình thức Quảng cáo sân bay Tân Sơn Nhất với mong muốn Quý công ty

  • fizxxx

    28 March 2020at11:57 am

    Whats up are using WordPress for your blog platform?

    I’m new to the blog world but I’m trying to get started and
    set up my own. Do you need any html coding expertise to
    make your own blog? Any help would be greatly appreciated!

  • Hi there, the whole thing is going sound here and ofcourse every one is sharing data, that’s really excellent, keep up writing.

  • w88

    28 March 2020at2:11 pm

    Generally I don’t read article on blogs, however I wish to say that this write-up very pressured me to try and do it!
    Your writing taste has been surprised me. Thanks, very great

  • I read this post completely about the comparison of most recent and preceding technologies,
    it’s remarkable article.


    29 March 2020at12:32 pm

    Article writing is also a fun, if you be acquainted with after that you can write or else it
    is complicated to write.

  • daftar idn poker

    30 March 2020at2:25 pm

    Good web-site you have here, i do agree on some things
    while, but not all.

  • Kampala International University

    30 March 2020at2:45 pm

    I have read several just right stuff here. Definitely worth bookmarking for revisiting.
    I surprise how a lot attempt you put to make any
    such fantastic informative web site.

  • online medicine order discount

    31 March 2020at3:59 am

    Hello there! I know this is kinda off topic but I was wondering which blog
    platform are you using for this website? I’m getting fed up of WordPress because I’ve had
    problems with hackers and I’m looking at options for another platform.
    I would be awesome if you could point me in the direction of a good platform.

  • Interview med Anna og Lotte

    31 March 2020at4:04 am

    We stumbled over here by a different page and thought I might check
    things out. I like what I see so now i am following
    you. Look forward to exploring your web page for a second time.

  • Gabrielle

    31 March 2020at4:11 pm

    Definitely consider that that you stated. Your favorite justification appeared to be at the web the simplest factor to keep in mind of.
    I say to you, I certainly get irked at the same time as people think about worries
    that they plainly do not recognize about. You controlled to
    hit the nail upon the highest and also defined out the entire thing with no need side-effects , other folks can take a signal.
    Will probably be again to get more. Thank you

  • order

    31 March 2020at7:54 pm

    Pretty section of content. I simply stumbled upon your weblog and in accession capital to
    claim that I acquire actually loved account your
    weblog posts. Any way I’ll be subscribing to your augment or even I achievement
    you access consistently quickly.

  • dewapoker

    1 April 2020at1:47 am

    Howdy! Someone in my Facebook group shared this website with us so I came to give it a look.
    I’m definitely loving the information. I’m bookmarking and will be
    tweeting this to my followers! Exceptional blog and amazing design and style.

  • Situs Bandar Judi Resmi

    1 April 2020at3:22 am

    Thanks for sharing your thoughts on Agen Judi.

  • Howdy! Quick question that’s totally off topic.
    Do you know how to make your site mobile friendly? My site looks weird when viewing from my apple iphone.
    I’m trying to find a theme or plugin that might be able to correct this issue.
    If you have any suggestions, please share. Thanks!

  • Bototos y Zapatos para hombres

    1 April 2020at11:19 am

    Hi there very nice site!! Guy .. Beautiful .. Amazing ..
    I’ll bookmark your blog and take the feeds additionally?
    I am glad to find numerous useful information right here in the submit, we’d like develop extra techniques in this regard,
    thank you for sharing. . . . . .

  • Georgina

    1 April 2020at5:07 pm


    What an intriguing post. It addresses every aspect.
    The best thing is you can reference various parts.

    It is not merely one of those filled with air,
    however it actually has genuine content material.
    It is easy to ignore the components which can be vital, however, you maintained it nicely explained..
    You accomplish that. Not only in the body but throughout..

    I will see the entire website now.. Highest quality Ive witnessed.

    Once again, appreciate your maintaining the discussion.

  • Hi every one, here every person is sharing such experience, so it’s nice
    to read this web site, and I used to pay a quick visit this blog everyday.

  • Prima X Testo

    2 April 2020at3:10 am

    I know this if off topic but I’m looking into starting my own weblog
    and was wondering what all is required to
    get set up? I’m assuming having a blog like yours
    would cost a pretty penny? I’m not very web smart so I’m not 100% positive.
    Any suggestions or advice would be greatly appreciated.

  • pkv games tidak bisa dibuka

    2 April 2020at4:24 am

    Hello, I enjoy reading all of your article post.
    I wanted to write a little comment to support

  • It is perfect time to make some plans for the future and it is
    time to be happy. I’ve read this post and if I could I
    desire to suggest you some interesting things or advice.
    Maybe you could write next articles referring to this article.
    I desire to read even more things about it!

  • I got this site from my pal who shared with me on the topic of
    this site and at the moment this time I am visiting this
    site and reading very informative posts at this time.

  • Cora

    2 April 2020at11:17 am

    Greetings from Carolina! I’m bored to death at work so I decided to check out your website on my iphone during lunch break.
    I enjoy the info you present here and can’t wait to take a look when I get home.
    I’m amazed at how fast your blog loaded on my cell phone ..
    I’m not even using WIFI, just 3G .. Anyhow, awesome site!

  • I simply couldn’t leave your site before suggesting that I
    actually loved the usual info an individual provide for your visitors?
    Is going to be back steadily to investigate cross-check new posts


    2 April 2020at11:53 pm

    It’s enormous that you are getting thoughts from this piece of writing as
    well as from our discussion made here.

  • WP business themes

    3 April 2020at7:18 am

    Hi! This is my first visit to your blog! We are a collection of volunteers and
    starting a new initiative in a community in the same niche.

    Your blog provided us useful information to work on. You have done a wonderful job!

  • judi qq Online terpercaya

    3 April 2020at9:19 am

    Terrific work! That is the type of info that are meant to be shared across the
    net. Disgrace on the seek engines for no longer positioning this post
    upper! Come on over and seek advice from my website .
    Thank you =)

  • Enhjørning bamse

    3 April 2020at12:03 pm

    Great blog here! Additionally your web site lots up fast!
    What web host are you the use of? Can I am getting your affiliate hyperlink in your host?

    I want my website loaded up as quickly as yours lol

  • education in europe

    3 April 2020at12:06 pm

    We are a group of volunteers and opening a new scheme in our community.
    Your web site provided us with helpful info to work on. You have performed an impressive
    job and our entire neighborhood will probably be grateful to you.

  • Judi Qq Online

    3 April 2020at3:15 pm

    Thanks on your marvelous posting! I quite enjoyed reading it, you
    could be a great author.I will be sure to bookmark your
    blog and will come back very soon. I want to encourage you continue your great work, have a nice evening!

  • situs judi qq online terpercaya

    3 April 2020at4:02 pm

    Quality posts is the secret to attract the users
    to visit the site, that’s what this web site is providing.

  • mua ban phe lieu sat thep gia cao

    4 April 2020at4:55 am

    I am extremely impressed with your writing skills and also
    with the layout on your blog. Is this a paid
    theme or did you modify it yourself? Anyway keep up the nice quality
    writing, it’s rare to see a great blog like
    this one today.

  • Great site you have here but I was curious about if you knew of any forums that cover the same
    topics discussed in this article? I’d really like to be a part of community where
    I can get opinions from other knowledgeable people that share the same interest.
    If you have any suggestions, please let
    me know. Bless you!

  • mua ban phe lieu nhom gia cao

    4 April 2020at10:24 am

    It’s actually a great and useful piece of information. I
    am glad that you simply shared this helpful info with us.

    Please keep us up to date like this. Thanks for sharing.

  • eating pussy

    4 April 2020at11:47 am

    Simply want to say your article is as astounding. The clearness for your submit is simply excellent and i can suppose you’re knowledgeable in this subject.

    Well along with your permission let me to snatch your feed to stay
    updated with approaching post. Thank you 1,000,000 and please
    carry on the gratifying work.

  • 77UP

    4 April 2020at3:22 pm

    To get the most out of your Slot, use it as a storage device. You can use your Slot to store all sorts of files with the help of readily available software. Aside from the obvious music files, you can store pictures, documents and more. The best advantage to this is the fact that you always have access to those files wherever you go.

  • E cigaret

    4 April 2020at3:57 pm

    Thanks for a marvelous posting! I seriously enjoyed reading it,
    you can be a great author. I will be sure to bookmark your blog and will
    eventually come back in the foreseeable future.
    I want to encourage continue your great posts, have a
    nice morning!

  • 우리카지노

    4 April 2020at4:33 pm

    Incredible! This blog looks exactly like my old one! It’s on a entirely different topic but it has
    pretty much the same page layout and design. Great choice of colors!

  • 안전놀이터

    4 April 2020at6:21 pm

    If you wish for to take a good deal from this piece of writing then you have to apply such methods to your won web site.

  • Qq slot Terbaru 2019

    4 April 2020at6:56 pm

    An intriguing discussion is definitely worth comment. I do believe that you ought to publish more on this subject, it might not be a taboo matter but generally folks
    don’t discuss such topics. To the next! Kind regards!!

  • Situs Bandar Judi Resmi

    4 April 2020at7:32 pm

    You need to take part in a contest for one of the most useful blogs on the internet.
    I’m going to recommend this site!

  • 우리카지노

    4 April 2020at9:48 pm

    This post is invaluable. When can I find out more?


    4 April 2020at11:22 pm

    Very shortly this site will be famous amid all blogging people, due to it’s good articles or

  • 더킹카지노

    5 April 2020at12:30 am

    Its like you learn my thoughts! You seem to understand a lot approximately this, like
    you wrote the ebook in it or something. I feel that you could do with a few p.c.
    to drive the message home a bit, however other than that, that is
    magnificent blog. A fantastic read. I’ll definitely be

  • 더킹카지노

    5 April 2020at3:52 am

    Hello, i believe that i saw you visited my website so i
    got here to go back the favor?.I’m attempting to find issues to
    enhance my web site!I guess its good enough to make use of
    some of your ideas!!

  • deposit pulsa Slot Online

    5 April 2020at5:18 am

    Link exchange is nothing else except it is simply placing the other person’s webpage link
    on your page at proper place and other person will also do similar in support of you.

  • Hash e cigaret

    5 April 2020at7:32 pm

    Fantastic beat ! I wish to apprentice whilst you amend your
    website, how could i subscribe for a weblog web site? The account aided me a acceptable deal.
    I had been a little bit acquainted of this your broadcast offered vibrant clear idea

  • Schwinn motionscykel

    6 April 2020at1:45 am

    I believe this is one of the such a lot significant information for me.
    And i am satisfied reading your article. But wanna observation on some common things, The web site taste is great,
    the articles is in point of fact great : D. Good process, cheers

  • mantolama bursa

    6 April 2020at10:50 am

    Hi thеre, I dο think your site could possiblу be һaving web browser compatibility ⲣroblems.
    Whenever I look at ʏouг web site in Safari, it looks fine however, wben oрening in I.E.,
    it has somе overlapping issues. I simply wаnted tо give
    yοu ɑ quick heads ᥙp! Beѕides thɑt, wonderful website!

  • 屏東火車站住宿

    6 April 2020at11:40 am

    I visited multiple websites except the audio feature for audio songs existing at
    this site is genuinely superb.

  • Private equity

    6 April 2020at1:33 pm


    How much of an interesting post. Your back every single angle.
    The top part is the diversity in consideration. It’s just not just one of those filled with air,
    however it really has actual content.
    It is easy to neglect the components which can be significant,
    however, you kept it nicely stated.. You do that.
    Not simply in the content however the feedback.

    I’m about to mosey on over to your web site and take a peek underneath the hood.

    Highest quality I have witnessed.

    Once more, thanks for carrying on this conversation.

  • mafia bkk slot

    7 April 2020at4:51 am

    Great web site. Plenty of useful information here. I am sending it to a few pals ans additionally sharing in delicious.
    And certainly, thanks in your sweat!

  • 슬롯커뮤니티

    7 April 2020at4:52 pm

    Wonderful, what a weblog it is! This webpage provides useful data to us, keep it

  • 분당룸

    7 April 2020at7:09 pm

    It’s wonderful that you are getting thoughts from this
    piece of writing as well as from our dialogue
    made at this place.

  • beginner woodworking projects

    7 April 2020at11:05 pm

    My brother suggested I might like this blog. He was totally right.

    This post truly made my day. You cann’t imagine just how much time I had spent for this info!


    8 April 2020at9:14 am

    Its like you learn my mind! You seem to know so much about this,
    such as you wrote the ebook in it or something. I believe
    that you can do with some p.c. to power the message home a bit, however other than that, this is magnificent blog.
    A great read. I’ll certainly be back.

  • Elektronisk cigaret

    8 April 2020at11:51 am

    Wonderful goods from you, man. I’ve understand your stuff previous
    to and you are just too fantastic. I really like what you have acquired here, really like what you’re saying and
    the way in which you say it. You make it enjoyable and you still take care of to keep it wise.
    I can not wait to read much more from you. This is actually a great
    web site.

  • gambar rumah 2 lantai di kampung

    8 April 2020at3:04 pm

    Greetings! Very useful advice in this particular post!
    It’s the little changes that make the most important changes.
    Thanks for sharing!

  • bandar ceme

    8 April 2020at4:11 pm

    Great post. I used to be checking continuously
    this weblog and I am impressed! Very useful information particularly the remaining section 🙂 I handle such info much.
    I used to be looking for this particular info for a very lengthy time.
    Thanks and best of luck.

  • satta king

    9 April 2020at2:17 pm

    Appreciate the recommendation. Let me try it out.

  • Spar penge ved online handel

    9 April 2020at6:26 pm

    I’m not sure where you are getting your information, but good topic.
    I needs to spend some time learning more or understanding more.
    Thanks for magnificent information I was looking for this information for my mission.

  • Fleksibel dobbelt dildo

    9 April 2020at10:16 pm

    you are truly a excellent webmaster. The website loading pace
    is incredible. It seems that you are doing any unique trick.

    Moreover, The contents are masterpiece. you’ve
    done a excellent job in this matter!

  • 온라인토토사이트

    10 April 2020at4:49 am

    Good information. Lucky me I recently found your blog by chance (stumbleupon).
    I have saved it for later!

Post a Comment

** We are still shipping corals as normal but we are not allowing anyone to visit us until the COVID-19 has passed and the country is back to normal. Stay safe and enjoy your reef aquarium.**

NEW customers get 20% discount use code UM20FR - RETURNING customers 10% discount UM10FR. Free Shipping on orders over £150.

Got it!
X myStickymenu