I never said anything about fish coloration.Gruntking;5065262; said:A black background would help but the fish will still try their best to camouflage to the substrate, which is why darker makes them more colorful.
I would say try that idea of mixing the sands, and ill be checking to see how that goes because if it adds more colors to fish im all in for it. The fish in my 75 have also faded colors since putting PFS and replacing the black gravel.
Im pretty sure its not that the fish are stressed out or anything, but more of a matter of adapting to the tan substrate.
IME with blue acara, they will be much lighter colored over lighter substrate, and a VERY dark blue over black substrate. I don't think they're stressed either.
Nice avatar btw, are they cutteri?