I'm taking care of a neighbor's pool who has moved 1000 miles away and is renting the property. The house is in a future highway right of way so he can't sell it and doesn't want to spend any more than necessary for repairs. Its an ig fg, around 4-5k gallons. I turned the tenants on to TFP as soon as they moved in, did a full set up and chemistry adjustment prior. Apparently there is a leak, I haven't had a chance to check the hydrostatic valve (I will when I can get my scuba gear back from a remote location.) In the meantime I have recommended that he utilize the puck chlorinator and I'll check the CYA and other levels periodically. The pool is losing too much water for evaporation to account for the drop. Make up water is from a softener, so that is a help. Other than adding bleach and MA to supplement the pucks, are there any other suggestions?