luc, fishing the pin bar a couple of weeks ago on an incoming tide and caught a few plastic bags on the line. It sure is becoming a problem. As for your other problem have you checked the alarm to make sure it works, have done it once, needed to short it out to make sure it was working. If you have reduced water pressure and the impeller is fine there could be build up of salt and corrosion in other places. Check your thermostat as it probably is full of crud.