okay, I was going to take down my tank to convert to sand, and paint my stand and stuff. My idea was paint the back of the tank black, and to have a black sand bed. My thoughts were that all the neon colors would be even brighter contrasting against black. Then I thought of this, black absorbs heat and my understanding is (and I'm probably wrong) that it absorbs light as well. So would I be taking valuable light away and create heat problems in my tank? Also I have heard sand is beneficial becasue it reflects light back up to the underside of corals, which wouldnt happen with balck sand right? Anyone ever used black sand?