I SHOULD know, but I can't remember the break-out.
I actually rarely use them, always relying on separates.
You'll need a lot initially, but when your pH levels get into the 7's you'll want to cut back. When your CYA level reaches 50, you'll probably want to stop and return to bleach, but there are situations where a higher CYA is preferable, like hot humid environments like aylad's Louisiana.


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