105 gal mixed reef, 22 gal frag tank, 12 g clownfish tank, 6 gal jellyfish tank (new jellies coming in January), 1 gal "beaker of doom", 5 gal bucket o' plankton culture. All in a classroom. Need to set up QT for fish ASAP. IMO multiple tank maintenance time totally adds up, which means I am always behind and do only the crucial tasks, deferring maintenance like cleaning pumps, lights, probes, finding out about battery backup, and setting up QT tank and getting fish. Jellyfish and plankton are a pain because they cannot take care of themselves.