Ok I have 4 96 watt power compacts thay are now about 15 months old so I realize it is time for a change. The issue is my tank has been running for over 15 years with basically few issues. It is a FOWLR tank and my frustration is the algae covered rocks. Since Sept 2011 I have been removing the boiballs slwowly and two weeks ago just removed the last one. I added a GFO reactor three months ago as well. The plan based on what I read and seen from the threads is to add coral rubble to my sump in the next few weeks and a small power head to keep the junk from settling on the bottom of the sump. I run a RO unit with two canisters and the membrane was replaced about two years ago. Regardless of new membranes I have always had the algae. Do I need more lighting? Before replacing bulbs which will result in algae anyways I thought it might be time for an upgrade. I feed about every other day and rinse all frozen food as suggested. I am not over stocked with the following fish IMO:\n \n3-4 inch hippo tang\n4-5 inch magnificant foxface\nsmall flame angel\nsmall clown fish\n3 inch longnose hawk fish\n2-3 inch black and yellow angel\nsmall lawnmower blenny\n4 inch orange spot goby\nXL vlamingii tang (12-15 inches)\n4 scarlet cleaner shrimp and 2 serpeant star fish\n30 mexican turbo snails\n20 nerite snails\n30 at least nassarius snails\n2 fighting conchs snails\n \nTemp: 78\nNitrite 0\nAmmonia 0\nPH 8.4\nNitrate 70\n \nI have a DSB over a plenum system with 2 koralia 1400 on the surface. An iwaki 70 for circulation and an iwaki 55 that works with my ETSS skimmer. I quiet 3000 for circulation as well. I realize it's time for RO membrane replacements but I am considering upgrading to 4 stage system sine I need to invest the money anyways in new membranes and filters. My dream come true would be a FOWLR with rock that is filled with coraline. Is it possible without adding tons of chemicals monthly? What lights would help if I upgrade?