I've a 150g tank with 2 cascade 1500 canister filters, an rifugerium, and a protien skimmer. Everything is hanging off the back of my tank. I want to clean it up alittle so I was thinking of getting a tank [30g or so] to put under my tank to run thing in. My question is does that sound like a good idea, or should I get a sump system. What would be the advantage of the sump.