I am doing school experiment on mangroves (to see if they grow best in FW, SW, or brackish) and I am trying to decide what to house them in. I was thinking a 10g or so rubbermaid container for each, and have about 2-3" of sand in it, with another 4" or so of water. should I dfo anything special to help them grow? also, I am planning to use a 65 watt PC fixture as a light source, it will run along thew top of each.