I decided, instead, to get a 2.5 inch goldfish [Too big for Gnag to eat, I don't want parasites to be spread] and placed it in their tank. I've added the Venturi outlet to the filter to aerate the water, and I've added more water so the fish can swim around a tad more freely. I'm hoping the fish doesn't die, many often do due to the dramatic changes in water. Well, we'll find out in the next couple of days. If it lives, it should help clean the tank, hopefully. I've already got goldfish food in stock. Anyways, do you think 1 goldfish is good enough, or should I get smaller fish or shrimp to help clean out the tank more? My friend can get me 5 Ghost Shrimp really cheap.