Originally Posted by indyws6
Not an expert, but...
The comment that others have made regarding leaks is likely in reference to the input side of the return pump (air leaks). If a pump sucks air on the input side, then it will put bubbles in the output stream and, consequently, into the tank. You will not see any water dripping becasue it is an air leak, not a water leak. A leak on the output side of the return pump will create a mess, not bubbles. Just my 2 cents. Hope this helps...
If that is the case, how can you tell it is leaking? And find it.