use diy co2 get 3-4 watts of light per gallon and buy a plant called glosstigma (ground cover)hair grass, nothing broad leaf it takes away from the balance of small narrow leafs suitable for your small tank.light maybe a compact florescent 36 watt
how often do you change your water?plants with added co2 need regular water changes maybe 1time aweek 50percent of water or every 2weeks 50 percent its a 20 gal with 4inches of just gravel about 25-30 platys a cory cat and the light is from my window,florida sun! oh yeah and a pleco to control...