Well i went to ps this am to check chlorine level it was 15 after 3 gal 12%. I added 2 more gal to get to 25! Problem is that it is impossible to measure accurately chlorine level w/o proper test kit and mine has not arrived yet. Strangest thing CYA has been around 100 now the clerk tells me it is 32 in 2 days!! The 5 way test is still telling me cya level is around 100. So, i am just ignoring the clerk, as a matter of fact, i am not going to that store again! Pool is still beautiful, lets see if it holds chlorine! on 6/8 cya was 30 i added the mustard algae junk at that time and within the week it was over the top. 110 with a 1/2 pool refill. Frustrated beyond words. brownish pools of fluffy stuff are still on the bottom of pool. We are vacuuming to grass daily, seems a little better. They seem to settle in foorprints and other indentures in liner. I can't remember my name some days let alone the shade of yellow/orange the shot glass method shows. We guys are the best and i look forward to a lasting relationship with you As soon as this pool reaches the point where is holds chlorine i am switching to 6% bleach.