I don't recommend. I let the Pool Calculator do it.mandyzdandy06 said:Richard how much would you recommend? I kind of thought I'd do it in spurts of about 4 gallons.
If you plug in you pool's volume, and all your readings, and down near the bottom select bleach/plaster/TFP, it will show the recommended FC shock level for your CYA level. Plug that into the target box for FC and what strength the bleach is and it will tell you how many ounces to add at once.
But you'll need to know something better than 20-25,000 as the volume. And you'll need an accurate CYA reading. It's all in Pool School and turning-your-green-swamp-back-into-a-sparkling-oasis-t4147.html, so I'm not going to explain it anymore. Too much typing.