All I have a well establihed 2 year old tank. I am again barreling red slime algea , a battle I have bot fought. In a year. I am struggling this time to identify the cause. My t5 bulbs are only 6 months old with 12 hours daily, I have plenty of flow with power heads and just replaced my filter carbon. Phosphates are at .25. I know that the algea is caused by an abundance of nutrients but have done water changes and had my skimmer working fine. I'm not sure why it keeps comming back. I am not over feeding either, so I can't thin k of why i would be getting it continuously. Any ideas for help? It's a reef aquarium rescently ph and calcium was low I have been getting that up. Slime keeps comming back. I just blow it off of rocks with the power head and let the filter pick up the floaters. Ideas?