So i'm new here so forgive me if i do something weird. i have a 7 month old reef tank. i have 2 damsels, pygmy angel, and a baby gold bared maroon clownfish. my corals are the overall hardy/beginner corals. the only sensitive ones are a single polyped duncan and a small open brain coral. the brain is the only hard coral, all others are softies. i have a purple and red slime algae break out. i have a 29 gallon biocube with no other added equiptment except a heater. I am very confused, because i have red coralline algae growing on the right side of my tank. Coralline algae need good water t grow right? then why do i have a slime break out. i have read up on how to, but i need to talk to some real people that have experience. I just started a weekly log, and here are my parameters as of right now(no water change yet): /PH: 8.6, Specific Gravity:1.024, temp. 81 F, Nitrate 20ppm. the reason for the temp. is that i just fought off an ich infection, but it is gone now, and i'm paranoid. how should i gradually get the tank used to an easier temp?