this is my 2nd season closing down my above ground pool. So far we have scrubbed and cleaned out all debri. We haven't swam in pool in over a month so Chlorine levels have been staying around 5 for about 3-4 days if longer. I followed the poolschool directions, did over night shock test and everything held, but had a set back to closing it b/c-had to go out of town. When I returned a week later everything still looked good but chlorine had drifted down to 5ish out of shock range
We plan on leaving our stairs in this year and just draining, unhooking everything and covering like always, however do I need to re-shock, test, then drain and cover? if so if I shock tonight and holds and then I close it down tomorrow will it be okay if my levels are still at shock level when I put cover on ,etc or do I need to let drift down? Also do I need algecide? My stablizer is at 40, and all other levels look good ph around 7.5 or so. we use liquid bleach and that is it, never had to add anything else.