frothhelmet
Member
So in the morning there is no surface scum / bio film / ? on the surface of my tank, so the outlet of the filter breaks the surface and sends water all the way across the surface of the tank. But then as the day wears on, a semi-transparent scum/film forms on the water surface and prevents the filter from pushing water to the opposite end of the tank. It is as if the surface water has become more viscous, and at the opposite end movement slows down to molasses.
What causes this?
Should I be concerned?
What can I do about it?
What causes this?
Should I be concerned?
What can I do about it?