For about $80-120, you can purchase the RENA XP3 canister.......When you have it running, match it with either:
(2) Aqua Clear 70's
or
(1) Aqua Clear 101
If you decide to purchase more larger tanks in the future, stick with the AC101........Having AC101's is an insurance HOB for any large tank that needs some extra polishing...........
High Budget: Fluval FX5 Low Budget: sunsun HW 404b on ebay. Depending on what the stocking level you may want to add a HOB like an aquaclear 110 or emporer 400 on the other end