I have a red sea max 250 tank,75 gallons I bought it from a guy who had no algae problem and had coraline on every surface. I moved all his water, rock and sand. I added more live rock and waited till the tank cycled. I do weekly 25 gallon water changes with ro.di water. I added a few colonies of Zoos and some soft corals, Green hammer, Green stay polyp, I added mating clowns a Yellow and a coal tang. i have a brittle star and some snails a few blue leg hermits. I dose 1/2 ml of bionoc a day. All my coraline is gone, replaced with a brown. gree, slimy hairy algae on all rock surfaces and the rear glass. I have the skimmer set high and the lights are on for 10 hours. I read in the posts to kill the lights, add a ton of snails, scrub the rocks ets. How do you scrub rocks with zoos attached?? Wont my corals need light?? Why did I lose my coraline? Any good suggestions? Thanks for the help amlsml@verizon.net