[reg45]

The alkaline phosphates react with glass to form silico-phosphates. Over a long period of time they can actually dissolve glass.

Alkaline materials can also dissolve the protective oxide coating that forms on aluminum. Once that happens the aluminum will dissolve in the alkaline material - often quite violently. In the old days, there was aluminum in Drano to make it foam up. As long as it was dry there was no big problem, but once it got wet - bubble, bubble, bubble, bubble, fizz, fizz, fizz.

[almost done by half]

Thanks for the info. Are you using this in your dishwasher?