Quote Originally Posted by moblaine View Post
Can you explain to me - Do I need to worry about the copper/Ph thing if I don't seem to have a copper problem?
No. If you have 0.0 ppm copper, it's not an issue.

Also, I am confused about the Frog question - are we both talking about the products from King Tech? A friend of my husband's installed our pool (he's in the installation business but doesn't sell chemicals). He has us using the same things he uses. Every year I insert a new Mineral Reservoir into the Frog but instead of paying an arm & a leg for their Bac Pacs, I just cut the bottom off and fill them with 1" or 3" tri-chlor tabs. What are the side effects you mention? Wouldn't the tri-chlor tabs BE a sanitizer?
You're not 'using' the Frog, your 'abusing' it!

The mineral reservoir has copper in it. But I don't think it always succeeds at adding copper to the pool (in other words: it fails to work, which is good, but expensive).

You're sort of working around their program, using their feeder. You need to watch out for staining when you replace the mineral pack. However, if you are just using the plastic cartridge as a holder for your own tabs . . . why do you need a new one?