dansdad
05-31-2013, 10:41 PM
I understand calcium hardness test is not necssary for vinyl, but does fiberglass need testing?
chem geek
06-01-2013, 04:51 PM
It depends on whether the fiberglass uses a calcium carbonate gelcoat. You could use some CH for safety -- say 150 ppm.
dansdad
06-01-2013, 07:00 PM
That's xactly what I will do. Thanks to u C. Geek
I did what you said didn't realize that stuff gets hot!!!