I cant get my fluval 305 to seal without leaking water. Do you guys have any ideas or tips that would help seal it? I havent used it in 6-12 months if that is important.
If its been a few months more than likely the O ring is dry. They have a silicon based lubricant you can use that will hopefully correct the issue you are seeing. Did some digging around and found Marineland Lubricant which should work nicely.