I currently have an African Dwarf Frog/community tank. As I fell in love with ADFs, I moved the tank into the living room, on the floor, in front of the tv. I don't watch tv anymore. But, the one problem I knew I'd encounter would be vacuuming, because it's sitting on the floor, in all its glory.. It's a 20 gallon long. I found an electric vacuum on Amazon that has an attached sack, which keeps the poops, but returns the same water to the tank. Is that a good thing?