Thanks for the link Gunner. Nice review. I've never used a bottom feed canister like that before. I really like the basket design of my 302. I think I'd like to continue using something similar. The reason I am wondering if the 302 will be sufficient for a 75g is not necessarily for the filtration, but also for the turnover. The 75g will be heavily planted and will include pressurized CO2 injected into the return line of my canister. I want to make sure I will have ample flow to disperse the CO2 in the tank. Is really like to keep as much equipment out of the tank as possible otherwise I would purchase a second 302. So as it stands right now, I'd like to continue using a single stacked canister for the 75g. I'll probably try the 302 out for the 75g and if it doesn't seem sufficient enough I'll look for a larger alternative.