I'm sure this isn't a "new topic", but I can't locate an existing thread. Just got back from out of town and the pool water is turbid. pH is good, but CYA is not registering at all; no cloudiness in the test vial. I need to SLAM the pool ASAP, so can someone tell me the best CYA product for the job? Is it something carried by the local pool store?... a place I haven't had to visit in several months, thanks to this forum! Is it a waste of good bleach to add a few cups in the meantime?