i use the Deltec ap 600($700 with shipping) for my 75g Capacity:Normal Stocking: 200g
Heavy Stocking: 130g but i still dont think is good enough. dont trust those BS capablity always want to go dubble or more like other ppls said bigger better u can feed more. the Bubble masus 160($260) r new Capability: Light Bio-load: 230 GallonsMedium Bio-load: 200 GallonsHeavy Bio-load: 150 Gallons, looks almost same exact like ap600 its worth a try.