I have struggled with the current temp of my tank.....88 Deg. I am looking to be a few degrees lower but dont want a goofy fan hanging over my tank or dropping ice cubes in at a daily rate. My tek light is a 6 lamp 324 watt T5HO. My heater doesnt even click on due to my light emitting so much heat. The black substrate probably doesnt help either. I want good growth so i hate to move my light any higher then the 12 inches that it hangs from the water surface. I would like advice from anyone with a similar setup and keeps high light plants. Lighting schedule is 4 on 12-10 and the other 2 on from 2-5. What are your lighting schedules? Burst or all on?