It appears that I have a pool leak. After turning on and off valves I have isolatd the problem. It appears to be related to the pool skimmer line and main drain. The pool pump primes when these valves are shut off and the leak is stopped----I am operating the pool cleaner suction line. Now the question is why after I turned the pump on do I have over 50 steel pellets and a screw in my pump basket? I also notice that at the base of the main drain (which is not operating)....I can see a couple of the steel pellets next to the drain. What is happening here? Is my leak due to an equipment failure? How do I resolve? Please advise.