They are in a year and a half old 112 gal with 8x55 watt power compact bulbs. Lights are on ruffly 12-14 hours a day. I don't feed them any physical food such as shrimp etc... The only things I add to the water is Calcium once every 2 weeks, Iodine once every 2 weeks, Reef Strontium once every 2 weeks, and DT plankton 1-2 times a week. I think thats it. Anything else just ask.