There is a film of oil on the surface of my water. I think it comes from the food. i'm not sure if it can harm my turtles,, My fluvial 405 does a great job of keeping the water clean but it can't keep the oil down
I even tried setting up a skimmer, it looked like it was working but the oil passed right through the filter and came back.
has anyone else had this problem?
thanks


