PhosBan Reactor 550 - Two Little Fishies

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PhosBan Reactor 550 - Two Little Fishies

57% Recommend this to a friend (4 of 7)

SKU: 207225

reg. $85.14

Special Price: $72.37

In Stock: 21
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What's This?

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Quick Overview

The PhosBan 550 media reactor has a low profile and built-in hanging bracket making it ideal for "hang on the back" applications. The Phosban reactor can house your favorite filtration media.

  • Great for HOB applications

  • Includes ball valve

  • Works great with Phosban Media

  • Requires feed pump


Full Details

The PhosBan Reactor 550 is designed to push water upwards from the bottom and through the media. This forces an even distribution of water throughout the media and prevents channeling from occurring. The PhosBan 150 can be mounted under the aquarium or hung on the back of the aquarium. It comes with barb hose fittings for 1/2" tubing and a 1/2" barbed ball valve included for flow control.


The Phosban 550 is compatible with any pump that uses 1/2" tubing and a flow rate between 100 and 250gph.



Max Media Capacity -750 grams

Inlet Tube - 1/2"

Outlet Tube - 1/2"

Max Flow Rate - 250 gph

Dimensions - 15.125" H x 4.5" W x 6.5" L

Distance required behind tank for HOB application - 5" min



What's Included?

Phosban 550 body
Phosban 550 Lid
Ratchet Clip
Soft 90 Elbow (3x)
Sponges (2x)
Dispersion Plate (2x)
Ball Valve
Short Pipe Adapter
9" Tube


Media, Tubing, and pump sold separately.


7 Items

  • Great Product By Chris on 1/4/2017

    Love this for our 125 Gallon "simple" reef tank. I have it now in the refugium area of Triggers System sump and it works great! I have to clean it about once a month but even then it is not that clogged as some state. The elbows probably could use some better engineering, but other then that great product.
  • Buy something else By Medtoad on 11/27/2016

    I have two of these that where put in when my tank was originally set up. The rubber connection gaskets are terrible and twice I've had them disconnect and pump water onto the floor (fortunately in a drained area) . Damaged many of my corals as my auto top off replaced the water and dropped my gravity to 1.018. The plastic pin spacer on the back also snaps off very easily. I've ordered a new reactor I hope will be better
  • Good product for a reasonable price! By acbear on 4/26/2016

    I order this reactor to battle a algae outbreak. While the instructions were not real clear on how much GFO was needed to fill the canister to the min. two inch mark, I found it to work. It been a little over a month and my algae has died off to about half of what it was. I do have to empty the reactor twice to clean the sponge at the bottom but just reuse the GFO media after cleaning the sponge. Just change the media today since its been over a month and I had high Phosphate and Nitrate levels when I installed the reactor. Fish are swimming and more active now too. I only wished I had got this product before I set up my tank in the first place.
  • Bad Gaskets By Nate on 11/11/2014

    I bought two of these before I realized how bad they are. The gasket is a thin rubber band that does not seat correctly when you screw the lid on. After a few media changes they leak. You get what you pay for.
  • Good for the price By Mike on 8/15/2013

    The fittings do worry me a bit in the very long term, but it is easy to set up and performs well. I use it for GFO and it can hold a lot and gets a good gentle, even distribution of flow through the media. Performs well for the price, and if you can mount it hanging inside a sump where it wont matter if it leaks then I'd say go for it for sure!
  • Cheap By Nikolai on 6/30/2013

    Reactor cheap clogged up very quickly internal rubber elbow made so short (cheap stuff) that it nearly enough sometime it slips the reactor made cheap it inconvinient jade sign is simply bad internal piping sometime disconnected and reactor won't working properly do not buy (waste of money)
  • quick and easy By Ryan on 12/22/2012

    II have two of these units. I use one for carbon and the other for biopellts. These units are really easy and quick to setup and they operate very well. They don't operate perfectly out of the box for biopellets, but for the savings a little modification was worth it for me.


Ask a question

Product Questions

What is the purpose of a reactor
Question by: Michael on Mar 23, 2014 8:19:00 AM
Hi Michael,
GFO has a tendency to clump and harden into a rock unless it is agitated. A GFO reactor like the phosban (or other GFO reactors like ours, octopus, vertex, etc) are fluidized bed reactors. The water travels up through the bottom of the reactor and upwards through the media, which causes it to tumble lightly and prevents it from clumping.
Answer by: Bulk Reef Supply on Mar 23, 2014 8:19:00 AM
Would you recommend using this reactor for biopellets?
Question by: Matt on Nov 14, 2015 1:12:00 PM
Hey there Matt,
Great question. This is not optimal for bio-pellets as it is not designed for the best tumbling of bio-pellets and there may be some clogs. Ideally selecting a bio-pellet designed reactor with the correct chamber to spin and tumble the media. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Nov 16, 2015 5:36:00 PM
what are the dimentions of this reactor? and the 150 model please? Thank you!!!
Question by: Tyler on Sep 2, 2014 6:53:00 AM
Hi Tyler,

The PhosBan Reactor 550 is 15 1/8 inches tall and 4 1/4 inches in diameter.

I hope this helps!
Have a great day :)
Answer by: Bulk Reef Supply on Sep 2, 2014 6:53:00 AM