I don't have as much as you on the go in my room - I have a 20 gallon with gold fish, 25 gallon fresh water tropical, 5 gallon crayfish, 150 gallon saltwater reef, and the crabs. Else where in the school there are 3 small gold fish tanks, 1 small guppy tank, 1 turtel, 1 ginne pig, 2 annoles, 2 firebelly toads, and a few hermit crabs. Each teacher is responsible for the displays in their room. In my room I have all of my studnets do all of the maintance on the tanks. I teach gr 9, 10 and 11, and coodinate our school's envirothon teams.