Thanks again Janet. I assume you're using acquired knowledge or something like poolcalculator dot-com to come up with the amounts. I just found that a short bit ago and got back from Costco with a whole mess of bleach that I'll add this evening. I'm looking forward to next year and not messing up my CYA so I don't have to maintain such a high chlorine level to keep the algae at bay! Till then it looks like I'll buy stock in the bleach companies and keep adding...