We switched our pool upon opening(May) to a SWG and have had issues ALL summer keeping chlorine levels up. I firstly have to admit I only have dip sticks from my local pool store to test at home, but those and the store readings for my cya have always read WNL. We have found that atlas every two weeks we have had to add 2-3 bags of "calcium Hypochlorite" based shock to bring level back up then it seems to dwindle back down. We have had a very sunny summer here in the north east but I still feel like the chlorine is just evaporating for lack of any better term. I was told by my pool store after the levels must have stayed low to long and pool was green despite two rounds of shock(3 bags each time) 3 days apart that I had a chlorine lock. each time I have gone in to get more shock(when dip stick reads virtually no detectable chlorine) he tells me "must be another chlorine lock". I feel like I have spent more in chlorine shock this summer then just using my old chlorinator. I am looking for a few tips on how to solve this issue. I should also add the pool clarity will cloud up slightly and i will notice a green film on my liner walls when levels get too low. My pump runs from 8am to 8pm and recently I had turned down my % on the SWG to 50% bc I thought this was related to the salt level reading on my generator (3200) however I am learning through these threads that it isn't true. We also have been in the habit most weeks to super chlorinate for a 24 hour period.
Any thoughts on what I should have been doing all season (we are approaching closing in 2-3 weeks)
Knowing I probably have an algae problem do I need to change my closing or just close and deal with it next year?
Pool Reading Earlier tonight (before 3 bags of shock)
I know theres a lot of information requested here so thank you in advance! I have spent the last 3 hours reading through forums and have felt so lost all summer and feeling like I finally could get some real ones. The pool store manager just keeps telling me "I don't know why you keep having a chlorine lock" :mad: