Since the addition of the AquaC Skimmer, we have noticed a surface film on the top of the water and a foamy buildup around the upper edges of the tank. Is this something to be concerned about? We have a powerhead in each back corner facing towards the middle of the tank. It doesnt seem to move the water along the back and sides.
Should I be doing something different? Is this normal? Does it manually need to be cleaned? Lots of questions, want to make sure the tank stays healthy.