ROWAphos 3.9 inch x 3.9 inch square Sponge, 5 pack.
ROWAphos 3.9 inch x 3.9 inch square Sponge, 5 pack. ROWAphos Sponge is designed to effectively remove phosphates and silcates, organic compounds and heavy metals from both fresh-water and salt-water aquariums. The ROWAphos Sponge is unique and offers the proven benefits of both ROWAphos and ROWAcaron in a single easy to use product. Now there is a clean and simple way to control the compoounds in your aquarium that fuel the growth of nuisance algae. Unlike other phosphate removal products, ROWAphos does not shock the animals or cause problems when used regularly. In fact, constant use of the product is recommended, as its abiltiy to control nuisance algae is a major benefit. Each box contains 5 sponges. Enough for 5 weeks to 5 months depending on application.