Question: I just bought a used 65 gallon with 5 cichlids and 2 catfish. The tank came with a mature Penguin 350 hob filter. However; I've inherited a Marineland 125 sump with a cap-1800 power head. If I put the Maraineland (with the filter cartridges from the Penguin) on the tank and remove the hob, do I need any other kind of filtration or will the sump be enough? The reasoning behind this is that the tank sits in my living room. The less visible tubes and cables (I plan on putting the heater in the sump) the better. Thanks in advanced for any advice.