My Trimac is currently on a dark substrate and this is what he looks like.

This is his substrate

As you guys can see he is always a dark olive green. I dont mind it but I wonder if the dark substrate stresses him out? I have been dealing with a small spot of lymphocystis on his tail and he has been a bit skittish. I know the issue is viral and can go away if fish is not stressed. So could his dark environment be stressing him out? Would he be better on a lighter substrate? Thoughts?

This is his substrate

As you guys can see he is always a dark olive green. I dont mind it but I wonder if the dark substrate stresses him out? I have been dealing with a small spot of lymphocystis on his tail and he has been a bit skittish. I know the issue is viral and can go away if fish is not stressed. So could his dark environment be stressing him out? Would he be better on a lighter substrate? Thoughts?