I tried to plug all returns,skimmer and main drain. I couldn’t get the rubber plugs so I used pvc threaded caps with Teflon tape. I know this is not water tight but how much should I expect it to leak in 12 hours? I tightened as tight as possible. According to my measurements pool is leaking about 743 gallons in 24 hours. Could it leak this much through three returns and and skimmer and main drain?