I stopped using the tablets a few years ago when I switched to a SWG, but I still have a nearly-full bucket of tablets. I just had the pool replastered about five weeks ago and have the water in ideal balance, except for the chlorine. I haven't added the salt, yet, so I've been using bleach and a floater trying to keep the level around 3 ppm.
The problem I'm having is that I need to add about 1.5 quarts of bleach to the pool each day to maintain the level, in spite of the floater. The floater is kept right over the drain (center of deep end) with its vents open fully. It is in the stream of the pool's strongest return to the point that small eddies form on the 'downstream' side of it when the pump is running. There are four three-inch tablets in it and it smells of chlorine when opened. Still, it's not keeping the FC up.
Here are my current numbers:
Temp: 68 F
Water is sparkling clear. I will double my CYA before I add the salt for the SWG. I will add the CYA Monday and switch to salt chlorine generation next weekend (I think). The solar will begin heating tomorrow (I just switched it on this evening).