On my last post I wrote that I was going to use 2 Emperor 400 filters an my new tank. You guys wrote replies about that I should get a canister filter instead. Well I did some research and decide to take the advice of the fish gods and get myself a canister filter. I decided on an Ehiem 2217 and 1 Emperor 400 filter. Will this be enough for the tank? Also are these good filters? I had 1 more question to ask, my emoeror filter makes a sound from the motor, is this normal. Are these filters usually noisy?