Red Slime Alage Problem

[jacksny22]

I've had my tank for 4 years. I recently changed my lighting system and since then I've had so much red algae, it covers everything. I tried the slime remover and it worked temporarily but it came back. Its disgusting.
I have good water flow, 3 powerheads in the tank. I've done water changes and cleaned it but it comes back, kind of like an epidemic. Any ideas?
Could it be that I'm using tap water?

 

[braydonosu]

What kind of lighting did you add? What size tank? What are your test kits saying? I'm gonna go ahead and say that tap water is a major contributor to the problem. I know when I lived in columbus the tap water was super high is Phosphates and nitrates.

 

[madwabbit23]

+1 to tap water being your bandit. I swapped from tap to distilled water ( 80 cents for a gallon, grab 1-2 a week) from the grocery store. Havent seen the ugly slime stuff since.