I am research getting a larger tank, wherein I intend to keep plants and discus as the main components. Now, I don't know if this is realtistic, but I need a canister filter or other opition, that: 1. I can add peat two, 2. has a UV sterlizer built in, and 3. has a 'precise' heater built into it. Is there such an option? I have seen an 'in line' system that does all of this, but I can't see alll the components for this, nor do I think this would work on a standard glass tank!?!? There are canisters that have UV sterilizers, but I haven't found one with a heater too. Does anyone know of such an option??? Thanks... 
