hey everyone, gonna be my birthday in 2 months and usually i get a present 1 month early anyways most likely i will be getting a new filter for my 40 gallon so i wanna get a canister filter this time . I was wondering what everyone thought about fluval and rena filters cause i hear a lots of good opinions from both and also would like to hear everyone here's opinions. And when i'm looking for a canister filter would i look at the gph or is that mainly for HOB's? is there a specific gph for a certain amount of water that i should look for? i want to get a little more filtration so i might be getting either the rena for 80g or the fluval for 75 what do you guys think? like i said before i am not sure if i am gonna get it though but i sure hope i do