I have a good number of large cichlids 16" male umbee, 9" male umbee, 10" tetracanthus, 13.5" wild dovi pair and 3 pairs of black nasty an more just a few on my list but i would like to no do the sun light help there color any when i open my shades in the morning for a few hours other then alge growing on the tank do that help the fish in any way.