how much bleach???

[day1]

Basically one gal. of 6% ultra bleach will raise 10k gal. of water 6ppm. That said, it'll take ~6.5 gallons to raise your total chlorine level 6 ppm. Depending on your CYA (stabilizer) level, you may need to double this to shock pool---to 13 gallons. That would give you a 12ppm increase....see how the math works. If you have really high cya levels(75-100) you may need to use 20 gal. to raise it to approx. 18-20 ppm to shock. That's one big ass pool! Get some muratic acid to lower the pH also, the bleach will raise it and you want it in the 7.3-7.5 range to help chlorine work better. If you need more cya to get into the 30ish range, you can use pucks and bleach if you'd like. Just keep the cya in 30-40 ppm. good luck with the lake!

No one can say how much bleach it'll take for a month, because you need to test water and post chlorine/cya/pH info at least. Then, depending on cya level, we can give you a good estimate on residual and shock ppm's. You may want to stop with the tabs just in case your cya level is in the 30-50 range. Once it gets much higher, you have to drain/refill to get rid of it.