Phosfiltrum is a new phosphate removing filter media by Seachem which is part of their high performance Aquavitro line. After years of offering only their Aluminum Oxide phosphate remover Phosguard, Seachem has gone all in with three different types of phosphate remover to address different applications.
PhosNet is a basic granular ferric oxide, Phosbond is a GFO-coated aluminum oxide, and the highest performing media in the lineup is Phosfiltrum. The latter media is made of a very high capacity granular ferric oxide, the likes we have been using for years, and probably comparable in activity to Rowa, the GFO that started it all.
What makes Phosfiltrum unique is that in addition to having a very high capacity to remove phosphates and silicates and not leaching it back into the water, it is much harder than other GFO. You may have noticed that ‘basic’ GFO medias are sometimes kind of soft and create a lot of dust and fine particles when they are handled.
The extra hardness of Phosfiltrum means that it is much more suitable for use in fluidized media reactor applications since it won’t break apart and go all over the tank and sump. Phosfiltrum is available in a pre-bagged 50g size and a loose 150g size with larger sizes likely to be released in the future as the awareness of this product grows.
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