I'm currently trying to set up a heavily planted 3 gallon. I am on a budget so I'm trying to reuse some old equipment and keep costs to a minimum. So far my plan is to use normal black gravel that is a size smaller than your average colored pet store gravel but isn't sand. I’ve got a piece of driftwood to do a simple hardscape with. I’d like to get java ferns, dwarf sag and anubias nana petite and then some red cherry shrimp. Ive got a powerful LED daylight light and will probably put the tank near some sunlight. Ive looked at Diane Walstads book on her ideas on a tank and she says a heavily planted tank that's mildly stocked will work. My questions are should I put a heater in(indoor temp is generally 65-70) and would a small filter be good for water movement? Are there any other ideas on plant choice or lighting?