I have a 75 moderatly stocked soft coral aquarium with an AquaMaxx HOB refugium with chaeto and an AquaMaxx HOB 1.5. I also have a Marineland Penguin 350 with Aquaclear sponges and each "half" of the filter houses a 100ml packet of Seachem Purigen and an 11.74oz bag of Chemipure Elite. Is this too much? I know the refugium and skimmer are the bare minimum required for a functional tank, but what can go on the HOB power filter side?