I am thinking of setting up a nano for a classroom tank for next year. I teach third grade. I want to start planning it now, get it set up and let it run all summer to cycle through so its ready to go next August. The tank will be 20wx18dx24t -I think. I am thinking of hanging a MH pendant over it. I want this tank to be as hassle free as possible. ( I know what I just said, what with my luck and the nature of saltwater, lol) I am thinking of having a shallow sand bed -about one inch. I have been doing some reading about rdsb in a five gallon bucket where you seal the bucket, have a line going into the bucket from the tank and a line coming out of the bucket back to the tank -sort of a closed loop thing. The rdsb would be for nitrate reduction, etc. I want to do some live rock in a bonsai/pillar form. I want to stock it with zoo's, rics, blue shrooms, 3-4 fish, shrimp or two, snails, etc. and a few sps. I would plan on doing multiple smaller water changes each week. What suggestions do you have to make this as stable and hassle free as possible? Closed loop or just put some form of powerhead/tunze, etc in it? Will need surface skimming. Put a overflow in it to go to the rdsb bucket? The less parts the better I am thinking. Les parts to leak, heat the water, stop working, etc.