Hiya folks,
I moved my turtles back into their 75 gallon tank and I keep having a problem of a soapy scum forming on the top of the water. It is fairly viscous and sticks to itself almost like slime. I am running a Fluval 405 filter and a fluval 4+ under the water, neither one seems to work. This stuff forms within a day or two and is bad enough at the end of the week I have to do a complete water change.
This seems a bit extreme for two small turtles in a 75 gallon tank. Anyone have any ideas on what it is and how to stop it? I saw the one similar post but mine does not seem to be caused by food, I feed mine in a different tank so they don't get food in their water in this one.
Thanks!

