I have 2 150 watt mh, the bulbs are over 6 months old. I have a aqua c remora skimmer and it has been filling up the cup with dark smelly skimmate. The only thing I test for is salinity 1.026, ph 8.2 and ca around 400 ppm. I top of with RO water and the only thing I add is B Ionic. I am going to the lfs to get them to test my water tomorrow.