I noticed slime shedding off of my RTC just now while I was feeding it and wondered what could of caused this. I changed my water twice this week 50% each time, scooping water from the surface because of the oil film on the surface and it seems to keep coming back. Water parameters are Nitrate 0, Nitrite 0, Ammonia either 0 or < 5.0, and Ph is 7.8-8.0. Can anybody tell me what causes the oil also because i know its not the food I feed it, I was thinking maybe its coming from the catfishes waste. Please let me know what could cause it to shed its slime like this and thanks in advance.
-Brian S.
-Brian S.