I just bought a 100 gallon tank and it came with a whisper 400
HOB filter and a magnum 330
canister filter. I don't know anything about canister type filters. Right now I only have the 'over the rim' connection for the tubes, should I get extension tubes to get closer to the bottom of the tank? How about shut off valves? Should the tubes be spaced apart away from each other? Should I use both types of filters? I am new at aquariums and will be happy to get your thoughts. So far, I have a 29 gallon with a Cascade 300 power filter and 4 platy fish.