I understand calcium hardness test is not necssary for vinyl, but does fiberglass need testing?
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I understand calcium hardness test is not necssary for vinyl, but does fiberglass need testing?
It depends on whether the fiberglass uses a calcium carbonate gelcoat. You could use some CH for safety -- say 150 ppm.
That's xactly what I will do. Thanks to u C. Geek
I did what you said didn't realize that stuff gets hot!!!