I have been scrolling through the alge pages and trying to get some understanding of what is making my alge so bad. I have a 220 gallon reef tank its been running for 8 months now and I have had green alge then a red slime outbreak and now everything looks like it has rust on it. I had been buying ro water from my lps and then bought a 4 stage ro unit. All my water parameters are where they should be other then calicum level is at380 and im raising that as we speak. I guess being new I bought all good equpiment but dont know what do do in this situation? I dont have a air pump in the tank and was also wondering if that is something that should be in the tank or if the air from the protien skimmer and the cirucliation of the sump produce enough air? I dident know if that might be the source of alge Shot in the dark but im new to this hobby. I thought having a 250 gallon fresh water tank for so long that it wouldent be so bad to do salt. I am hooked and trying to better understand... Any imput please.