Best place to buy CYA

[tpspeier]

I buy CYA at Lowe's. It's 100% CYA and comes in a granule form.

[FormerBromineUser]

I only need to add small quantities of CYA and do so by adding 99% dichlor that I bought at Sam's Club. (Guru-Ben's recommendation). Adds CYA and FC in manageable quantities and is readily measurable.