I've been having problems with an oily film on the water surface which I've been regularly draining off. What is quite strange is that I have a lily pipe set, so the water is continually 'skimmed' yet that isn't helping. My thoughts are that the oil must go right through the external canister filter and is being spat out again to float to the surface. I recently cleaned the filter media, hoping that might help, but it didn't.
Aside from that, the tank has been running for about 2-3 months and is very healthy, nutrient levels are extremely low and plants and fish thriving. Stocking levels are low. The fish are never overfed and there is no uneaten food lying around for more than a few minutes, and there are no fish or inverts missing, so no dead bodies, so I don't know where the oil could be coming from.
Has anyone else experienced anything like it and found the cause?
Aside from that, the tank has been running for about 2-3 months and is very healthy, nutrient levels are extremely low and plants and fish thriving. Stocking levels are low. The fish are never overfed and there is no uneaten food lying around for more than a few minutes, and there are no fish or inverts missing, so no dead bodies, so I don't know where the oil could be coming from.
Has anyone else experienced anything like it and found the cause?