^ I recognize those lights, they are very similar to what i have, so that means you are likely running 4 T5 bulbs, just not sure if they are T5-HO or not?
But the fact you are saying its brown leads me to believe it could possibly a detritus build up?
T5-HO 54watts it says on them.. What does that mean lol?? It looks brownish when I scrap it off glass but just looking at tank it's pretty clear/white looking..
I do all my water changes through a gravel cleaning siphon atleast once a week and it all looks pretty clean most of the time apart from the algae growing
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