GHA and new lighting

[kathya0321]

I currently have a bad GHA outbreak, I used Reef Flux without any good results. So now I'm thinking that it could possibly be my Kessil A160 Tuna Blue. I had the intensity set on 45 for 4 hours of a 12 hour light cycle. I upgraded from an A80 Tuna Blue. Would I be better off treating my tank again and leaving my lights off and see if it makes a difference?

 

[Lavey29]

Well lighting can contribute to GHA but often other factors are involved also. How old is the tank and complete current parameters? Do you have a diversified cleaner crew? Do you do daily manual removal of GHA? Weekly water changes? Cutting lights to 6 hours with blue and uv only no whites can help.