I have a 33 Gallon established Reef, mostly with Zoo's Palys and Mushrooms. I have 4 small fish and the tank is doing great! I'm presently running a mud system and very pleased with it, however there is a film on top of the water that covers probably half the aquarium? Trying to figure out what to do about it, I do weekly water changes....Just looking for some advice?
Thanks....
Thanks....