I've got an established 55g tank with no sump. am running 2 filters and wouldn't mind getting rid of them in place of a sump. Is there a way i can do so without spending a whole lot of money on overflow box and without drilling. I tried to do one before and used my skimmer as a return pump and I started a siphon as the suction, but was worried about one failing and causing a big mess, and my skimmer was not actually skimming anymore. Any ideas?