Filstar Phos-Zorb is a special filtration material, packaged for use in all API Rena Filstar XP Series Canister Filters, but can be used in other applications. Phos-Zorb selectively removes phosphate and silicate. Phosphate is a by-product of fish metabolism, decaying organic matter, and is an additive in some water conditioners and filter medias. In saltwater aquariums, excess phosphate lowers the available calcium and magnesium necessary for the growth of hard corals and other invertebrates. Excess phosphates also promotes the growth of unwanted nuisance algae, and can lead to poor coral health and bleaching. Silicates promote the growth of unwanted brown diatom films.
Rinse pouch under tap water for several minutes to remove dust and to activate. The activation process will temporarily generate some heat. Replace pouch every 2 months or when testing indicates presence of phosphate or silicate.
the best out there for fresh or salt water to remove phosphates. i have been using this in my 125g salt and my 70g planted discus tank. No more algae bloom. i think i go through who know how much water as i ro each tank biweekly.