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Home » Saltwater Aquarium Supplies  » Filters  » Inline & Specialty Filters  » Phosphate Reactors  »  Two Little Fishies GFO Phosban Reactor 150
Two Little Fishies GFO Phosban Reactor 150

Two Little Fishies GFO Phosban Reactor 150

Average Rating 4.5 101
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Two Little Fishies GFO Phosban Reactor 150 Information

Product Manuals & Documentation

The Phosban Reactor 150™ has become a staple amongst most aquarists who keep SPS corals. So much so that you often see Phosban used interchangeably with the term GFO or Granular Ferric Oxide. It can be mounted hanging on the back of the aquarium or below the aquarium. Includes ball valve for regulating flow, and flexible connection fittings that rotate 180 degrees to allow a perfect custom fit to your installation. The threaded lid design makes servicing quick and easy. One reactor for aquariums up to 150 gallons.


  • Approximately 14" tall with a 3" Footprint.
  • Normal operation with 130 grams (250ml) to 200 grams (385 ml) of PhosBan, filling up to 1/2 the column.
  • Reactor is rated for up to 150 gallons.
  • Recommended flow rate: 20-30 gph for 130 grams PhosBan, 30-40 gph for 200 grams.
  •  uses 1/2" I.D. vinyl tubing

Manufacturer Info

Two Little Fishies
Two Little Fishies, Inc. was founded in 1991 to promote the reef aquarium hobby with its introductory video and books about reef aquariums. The company now publishes and distributes the most popular reef aquarium reference books and identification guides in English, German French and Italian, under the d.b.a. Ricordea Publishing.


No Warranty

Two Little Fishies GFO Phosban Reactor 150 Reviews

Average Rating
(101 reviews)
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of 11

Great company

Reviewers Rating Excellent!

Posted: 7/12/2015 from DANA POINT, CA UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: I have three of this product and have found it to be excellent. The people at the company have been very helpful in getting me replacement parts, etc.

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Nice Reactor

Reviewers Rating Excellent!

Posted: 4/30/2015 from LOGAN, UT UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: This is a very simple and easy reactor to set-up and use. I have not had a problem with the unit in any way. Reactor works well and no channeling seen. Noticed a drop in algae growing on the side of the tank after reactor was put into service. For an inexpensive purchase compared to some of the more elaborate reactors. Good buy for my system.

1 of 1 People found this review helpful, did you? Yes No

Great Reactor

Reviewers Rating Excellent!

Posted: 11/3/2014 from SAN DIEGO, CA UNITED STATES
4.5 5
Experience Level: Intermediate

Comments: Got this reactor a couple weeks ago and it has been working great. Flow through the reactor is awesome. No trouble with the rubber elbows, I just made sure there was no strain on them by making the hoses plenty long enough and not trying to make them bend in any odd angles. Overall, a great product for the money.

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Great Value

Reviewers Rating Excellent!

Posted: 8/9/2014 from COLUMBIA, TN UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: Works great. Only been running for 3 days and brought my phosphate level down from 0.07 to 0.00! Excellent value for the money.

1 of 1 People found this review helpful, did you? Yes No

Phosban reactor 150

Reviewers Rating Excellent!

Posted: 5/25/2014 from EFFORT, PA UNITED STATES
4.5 5
Experience Level: Expert

Comments: As far as I'm concerned the phosban reactor 150 works perfectly good product for the money. The only thing I found that should be changed is the hang on bracket could be I little wider for wider top rims. I have a 125 gal tank and I had to grind down the rim a little so the bracket would fit perfectly. All that said very good product. Works good with the maxi jet 1200 you just need to tone it down a bit. The only reason I gave it a four and a half star because of the hang on bracket not the performance the performance is great.

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Cannot go wrong

Reviewers Rating Excellent!

Posted: 3/1/2014 from Leonardtown, MD UNITED STATES
5.0 5
Experience Level: Expert

Comments: Looking for an excellent reactor that is far less expensive than the Gucci models? This is the way to go. Excellent uplift and uniform dispersion of media. Hangs nicely on the side of a fuge or tank. I use three of them for GFO, Carbon, and Bio-pellet. Never had a leak.

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Good Biopellet Reactor

Reviewers Rating Great

Posted: 2/23/2014 from Houston, TX UNITED STATES
4.0 5
Experience Level: Intermediate

Comments: Overall good biopellet reactor. Screens are needed to use it with biopellets. The construction seems good except for the soft rubber elbows. The locations of the inlet and outlet could be improved.The reactor cost was 50% of other reactors. I'm happy with my purchase.

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Versatile with a flew flaws...

Reviewers Rating Average

Posted: 7/31/2013 from STONINGTON, CT UNITED STATES
3.0 5
Experience Level: Intermediate

Comments: I used this for Carbon/GFO and got decent results initially. Over time (2 months) the supplied 90 degree elbows cracked and required replacement. The included elbows are flimsy and will require replacement. I put hard plastic ones in as replacements. One of the primary reasons I pulled this off my tank was the method/manner of changing out the carbon/GFO. The top can get stuck, and pulling out the carbon/GFO is messy. I highly recommend the other canister style with an internal cylinder...much easier for refilling/changing. The versatility comes into play when you decide to change what you're running. I shifted from Carbon/GFO to a bag of chemipure elite, so this sat unused until I realized I had a CO2 problem (chasing pH for a couple of days), so with minimal modification, this became a CO2 scrubber added to the intake of my Tunze 9004. This helped me to bump up and stabilize my pH in a room with a CO2 problem. I'm torn on if I would actually recommend this as the parts that made it decent were mods along the way and not 'out of the box'.

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Cheap Plastic

Reviewers Rating Unsatisfactory

Posted: 7/12/2013 from CUMMING, GA UNITED STATES
1.0 5
Experience Level: Expert

Comments: Pretty unhappy thet the top that screws on is so flimsy. Very dissapointed in this product.

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Not Good Cheap

Reviewers Rating Below Average

Posted: 6/29/2013 from NJ
1.5 5
Experience Level: Intermediate

Comments: Look OK I've got it it cheap and it popular but In my opinion product is not good. You take it and it feel very cheap and flimsy internal rubber elbow is short and very inconvenient to set up It did happen when I set up the reactor and find out that internal connections got disconnected so I needed to disassemble everything and start over again. Reactor is plain cheap to the degree when it loosing it function. I bought bigger model it has 1/2 inch tubing which is waay ton small for the model I am using a marine land 600 g/h pump for bio pellets in this reactor and it is not enough anyway I would not buy it and to recommend to anyone Cheap, inconvenient, often not functioning right

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