Fish 1:


Fish 2:


It seems they spend less time buried in the substrate than usual for the past 48 hours, but they appear "asleep" on top of the substrate. Fish 2 has darkened in color, while Fish 1 has gotten lighter in color. Fish 2's color has me a bit worried. They eat at night. You can see I should cut back their feedings. I think they even eat the snails in the substrate.
I believe I saw the shedding happen soon after I got these fish, but I could've been wrong. Does anybody know how often it's supposed to occur? Is it a stressful process for them, i.e. do I need to do more water changes during this time?
Amanda