Hehe, the cup *was* very clean afterwards. My main reason for posting was to try to figure out if I should toss these tabs in the trash or keep using them. From the replies so far, I guess the tabs might still be good. My numbers have been mostly fine: FC 2-3, CC 0, pH 7.5, CH 250, CYA <30

My confusion is based on two things:
1. Even with the floater wide open I still need to add bleach to keep the FC above 0.
2. My CYA level has never risen even though I've been using tabs since opening the pool (it was 0 initially until I manually added a few pounds of CYA when it became clear that the tabs weren't doing the trick).

My original intent was to just use the tabs until CYA gets higher and then switch to bleach only. But this hasn't happened... Anyone know how much CYA is actually in these tabs (Leslie's brand)? I.e. is there anything that says "using XX tabs will add YY ppm CYA to a 10K gal pool"?