Don't know if I should be worried or not but I figured I should ask just to be safe. I have recently began breeding MTS and don't see them all that much during the day.However, when I turn the light on in the mornings or just randomly to look at everything I notice there are dozens of snails ALL over the glass and towards the water line. Is there not enough oxygen in the tank because I heard snails climbing towards the water line is a sure sign of oxygen deprivation.