Who out here is using Siporax Filtration Media in their sumps ? I am interested in seeing how old your system is / how long using this product ? im using a large amount for a 425 Gal. T.W.V and i don't ever get any detectable No3 / Po4 , now i also have a fuge with cheato and Marine Pure blocks , im guessing i have " too much filtration " as corals are pale in color ( before my crash ) . Just wondering how much bio load in relation to filtration ?