Hi I just bought 3 bags of Bio Chem Zorb filter media (according to instructions each bag will do 20gal and I have a 55gal tank) to go in one of the compartments of my ViaFlow canister filter. I was wondering if anyone else had ever used them? Also I have been using BioStars as my main biological filtration media for some time and they seem to be very effective, I don't see much about them though and was wondering if anyone else had ever used them too?