Neptune Aquatics

1238 N. 5th St.
San Jose, CA 95112
Phone Discontinued

Monday - Friday: 11am to 7pm
Saturday\Sunday: 11am to 6pm

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Phosban by Two Little Fishies150G

SKU: DG260
Web store price may not reflect retail store price.


Take care of your phosphate problem with Two Little Fishie's PhosBan, a new product popular with reef aquarists as it uses ferric (iron) oxide hydroxide, instead of aluminum oxide media. PhosBan is a highly porous super adsorbent granular filter media, binding so much phosphate that it can effectively keep phosphate levels in aquariums low for months. It is ideal for use in marine, reef aquariums, and freshwater aquariums. PhosBan gives long-lasting control of phosphate levels for a clean aquarium and enhanced growth of hard and soft corals. PhosBan Phosphate Adsorption Media. Problem solved.


  • Do not rinse before use. It can initially turn the aquarium water slightly brownish due to release of fine particles. This is temporary and harm- less to fishes, plants and inverts.
  • PhosBan must be used in a flow-through contact chamber, not merely placed in the aquarium. Use with a phosphate reactor, or put it in a filter bag or between 2 layers of fine filter floss in a canister filter or filter chamber of a wet/dry filter or sump. Position so that the water is directed through it. It crumbles easily and should be packed firmly so that the granulars do not tumble, which would grind them. In a canister filter, the flow can be reduced with a valve on the output so that it is possible to measure zero phosphate in the water leaving the canister.
  • Recommended usage: Use 50g per 50 gallons of saltwater. Use 50g per 100 gallons of freshwater.
  • This media is safe and can be used at more than 5 times the recommended usage quantity, but at a high dosages it can cause a drop in alkalinity. Monitor alkalinity and correct if necessary with buffer or other alkalinity supplements.
  • The useful life of this media depends on the phosphate concentration in the aquarium. It can be effective for up to several months before it needs to be changed. Replace when phosphates begin to rise.


  • Synthetic Ferric Oxide Hydroxide
  • Invertebrate safe
  • Treats 150-750 saltwater gallons, 300-1500 freshwater gallons