I use approximately 4 of the large jugs of bleach from WalMart a week in my 29K IG. At $2.54/jug, that is just over $10 weekly. I don't add anything else, except a loading dose of CYA at the beginning of the season, if I need it.
I run an intentionally high CYA, so I don't have to add bleach daily--but I do have to maintain a higher baseline level than everybody else. Still ends up using less chlorine with high CYA in my climate.
Janet
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