We had a few days of freezing temps here and even though I kept the pump running 24/7, the plastic lid to our Pentair 300 Chlorinator tower popped off and there's a chunk of plastic missing so it won't go back on. I only found out because i noticed the pool water level dropping. I've shut down the pool an closed the skimmers but water is still coming out the top of the chlorinator. Is there anything else I can turn off to prevent this? Not sure where the water is still coming from. We don't even use this thing because it tended to clog. Would like to disconnect and remove it at some point.