Sams/Costco Chemicals

[Poconos]

If I remember right, a few years ago, I saw two flavors of pucks at Sams. One was a Multi action or something like that and the other just plain. Ingredients however both showed the same so you couldn't tell from that part of the label. Maybe the multi one had copper? I think the multi was a little more expensive too. Always get plain. That was at a Sams in northease PA.
Al

[PoolDoc]

Could be. "Multi-action" is a bad word, when it comes to pool chlorine, and usually means 'goop'.

In my area, and online, the only products I've seen this year the unblended PoolBrand stuff, but that doesn't mean they can't slip some bad stuff in at local stores.