I'm having problems keeping chlorine in my pool since opening it last month. I was thinking I might have chlorine lock, but my local pool store said no, but didnt have any good advice other than keep adding liquid shock. I was hoping you might help?
I have an inground 25K gal pool with auto cover (sun only hits the water when were in it or cleaning it.) this mornings readings are: Free chlorine .44, Total chlorine 1.10, PH 7.4, Alk. 182, CH 229, cyan acid/stabilizer 74.
July 3rd I drained 6 inches off the pool and added fresh well water - this didnt mess up any chem. balances I added 3 gal. sanygen liquid shock due to low chlorine level (.28 & .73). By the 4th chlorine was readiing 5.51 for both free/total. Yesterday/next day chlorine was at .35 free & .59 total. Last night I put fresh chlorine tablets into my chlorinator and added my last gallon or liquid shock. This morning I'm at .44 free, 1.10 total, 7.4 PH, 182 Alk., 229CH, and 74 stab.
The pool is crystal clear, I just cant keep chlorine in it. Suggestions?
FYI I'm using brand new ColorQ tester kit, also Test strips show everything in "OK" range but showing no chlorine as well.