I'm looking to buy a canister filter to use on my soon to be 40 gallon long (48"x12"x16") and I want to know what one would be the best? I'd prefer to use just one canister and maybe down the road get a second one for extra bio/polishing the water, what would be a recommended GPH? Isn't it like 4-5x the tank amount is the GPH of canister I would need?
Thanks!
Thanks!