WHAT TIPE OF CORAL CAN I KEEP WITH 2 40W 18K AND 2 40W ACTINIC. I DON'T PLAN TO KEEP ALOT OF CORAL IN MY TANK RIGHT NOW. I'LL BE UPGRADING SOME TIME NEXT YEAR BUT I DON'T WANT MY TANK TO LOOK LIKE A DESERT WITH ONLY SAND ROCK AND SOME FISH.