i to will convert in spring {mil wis} 4yr baq user no problems this year so far what im going to do is close the pool very clean, no leaves ect, Im not going to add any closeing chemicals and when spring comes go from there, adding my shock or bleach,when u fill your pool in spring your baq level should be 0 any questions let me know for baq users u have to be a step ahead of your pool, up keep is very important,