So I'm building a sump for my 75g tank and switching from a canister. I'm doing a 20g long I got from petco for 25 bucks today as the sump. Planning on a eshopps pf-800 hob overflow, aquamaxx AF-1 filter roller. What would you suggest for the return pump and heaters? I was thinking 2- 150w eheim Jager heaters linked to my inkbird controller. Would you do this or just one 300w heater? I know people will say drill the tank and all that but not drilling this tank as it's already a functioning tank and...yea just not drilling this one. Plan is to have first chamber with the filter roller, second chamber will be a refugium with chaeto I'm growing and last chamber as the return. Thanks