How old are your bulbs?
I had a 10gal starting to look poor, my red open brain had begun to bleach slightly.
I to had nothing change and water chem was satisfactory, the only thing that was suggested to me was the bulbs in my light fixture where a little old.
I have since moved much of the live stock to my other tank and are now under metal halide. Everything seems to be looking better, but it is also to early to tell.
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If it is just us,
It seems like an awful waste of space.
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