This is my first post...
I have a 24' round above ground chlorine pool, sand filter, running well for three years or so. We went to close it for the season and found it had an algae problem. So I shocked the @#$% out of it and put some algaeside in the pool, circulated 24 hours, then put some hydro-floc in the pool, unplugged the filter and waited 24 hours to allow the algae to gather at the bottom, at which time I vacuumed the pool to waste a few times. The water is perfectly clear and the bottom is clean, ph and alkalinity were a bit low (so I added some sodium hydrogen carbonate until they looked good) but the Chlorine level has been really high (over 10ppm) for two weeks.
So enter my stupidity. I read somewhere that you can lower chlorine with hydrogen peroxide. So I found a left over gallon of Baquacil, from when we were running a Baquacil pool, and looked at the ingredients to find it is basically 27% hydrogen peroxide. Not really knowing how much to add, I added the entire gallon.
It basically wiped out all of the chlorine in my pool. The water is still perfectly clear, and the bottom is clean (thank god it didn't turn green). I don't have a dropper type pool test kit, I've been using test strips for years with decent results. I guess I should pick one up.
So...., do I now just keep adding chlorine until the level comes up? Is this a free chlorine issue, but I may still have "locked" chlorine in the pool? Anybody help me out here??