My name is Tim Howe. I have a 75 gallon reef with a red slime problem. It all started when I changed from a 58 gallon to the 75. I replaced all of the gravel with new crushed coral. I added about 20 lbs. of live rock and of course the extra water to make up the difference. The tank went in to a cycle and I lost all of my corals. It then developed red slime. I have tried numerous remedies with no effect. I installed a chiller unit to regulate the temperature and keep it at 75 degrees. I have torn down the tank twice and cleaned the rock and gravel. All to no effect. Can anyone help me.