Closed System Water Additives

One more cautionary note to add to Jim's reasonably careful comments...

It can get surprisingly hot when you add the crystals to water. Heat of dissolution isn't a phenomenon most folks are expecting. Don't use a thin plastic container to dissolve the lye in. Just in case you add more than you meant to. I remember a great chem lab demonstration. The water foamed right up and splashed around the counter top. Great low budget evil-spirit-movie special effect.

Pure lye has been pulled from a lot of store shelves recently. Lawsuitaphobia.

Also will add, and I think the container will state this, DO NOT ADD WATER TO THE CRYSTALS! Always add the crystals slowly to a substantial quantity of water.

These guys were very helpful. They have some products for larger systems not on site, listed but more economical. They also supply a sample bottle and box to return to them for a follow up test after you run your system a couple of months after first treatment. They didn't try to up-sell you either, refreshing.
http://www.woodboilersolutions.com/
Rob

Appreciate all the suggesrions and links. Thanks

Mike