i am looking for a center piece fish for my 20 gallon tank that is HEAVILY planted in fact i had to move the plants several times just so the fish could swim i had tall plants in the front and the back.now i go by the rule tall in back short in the back.here is my stock AqAdvisor - Intelligent Freshwater Tropical Fish Aquarium Stocking Calculator and Aquarium Tank/Filter Advisor my temp is 74 degrees.i have thought about it a bit and here is what i have came up with 1 dwarf gourami,6 guppies,m/f honey gourami pair,3 mollies,1 panamanian yellow cichlid,6 platies,1 sajica cichlid,3 sword tails,1 thick lipped gourami,or 1 key hole cichlid.