Hey I'm a school teacher and I put up an aquarium in my classroom. Its a 32 gallon bow front. I have two plecos, two hill stream loach, lots of shrimp, and some guppies. I want to bring them home with me for the summer and keep them in a tank there. Do I need to remove all of the sand too or can I leave the sand and just take out the water? I have almost 3 inches of sand and it can get really heavy.