Being hobbyists for more than a decade, we’ve seen our fair share of ‘miracle’ products that make bold claims about their abilities and promise a one-off fix for all manner of problems. There are relatively few that fully deliver on this promise though and sometimes, we find that for the expense involved, the product hasn’t really lived up to the hype. Having used Polyfilter on and off for years, we’ve been impressed with its performance, but when put under close scrutiny, is this product really doing everything it claims?
Well, Polyfilter has been around for a long-time now and has been tried and tested many times. It was actually commercially launched back in 1976. Now, being distributed with refreshed branding in the UK by Arcadia, this media is made by US firm PolyBioMarine and claims to adsorb a wide range of pollutants from either saltwater or freshwater including Proteins, Amino Acids, Nitrite, Nitrate, Ammonia, Phosphates and Toxic Metals. While this adsorption role follows roughly the same principle as Activated Carbon, Zeolites, GFO etc, Polyfilter differs in that it is a woven matrix of polymer threads and it is these fibres which tightly bind chemicals. Forming a fairly innocuous looking filter pad, Polyfilter is nonetheless very easy to administer either being used passively, or with water actively 
being passed through it. For this method it can easily be cut to fit in powerfilters for example. We actually used ours between sump baffles effectively (note: always ensure that if the filter blocks water won’t overflow the sump). Another benefit of the microstructure is that Polyfilter will not dump what it has adsorbed like certain other media can. It’s also pre-saturated with trace elements so shouldn’t impact on these in a reef More: Review: Arcadia Aquarium Polyfilter… More:
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