Hello guys. We had a great year with our new pool crystal clear water thanks to tfp anytime I did water tests went to calculater it was on the money everytime. So my problem now is I am closing pool myself this year I talked with a pool guy I see on jobs I work on he is closing pools now so he told me his method and says here is winter Algecide for your pool he says add this and shock it run filter and blow out lines etc. I go home add bottle winter Algecide and leave pump running leave come home pool is cloudy. I freaked I'm cursing at myself never had a cloud in pool So I bust ou my tfp test kit do all test ph 8.2 as expected saltwater pool I add acid every month ta -70 Chlorine high as expected I'm closing so started adding But my ch was 1375. How can it be that high is it the Algecide ? And I have a problem with closing it cloudy not my idea of a good closing Any help is appreciated