Hi all I am new here but have had a reef tank for 13 years now. I have a small system. Its a 55 main with a 15 gallan HOB refugium a 20 gallon sump, a 21 inch x 6 reactor with biopellets, a 15 x 3 phosphate reactor. I use two 165 watt led timer lights fully programmable by the hour-minutes for intensity as well as a programmable 216 watt T5 light. I also have a 4 pump auto Doser.