It depends on whether the fiberglass uses a calcium carbonate gelcoat. You could use some CH for safety -- say 150 ppm.
Re: Understood about calcium and vinyl, but fiberglass????
It depends on whether the fiberglass uses a calcium carbonate gelcoat. You could use some CH for safety -- say 150 ppm.
15.5'x32' rectangle 16K gal IG concrete pool; 12.5% chlorinating liquid by hand; Jandy CL340 cartridge filter; Pentair Intelliflo VF pump; 8hrs; Taylor K-2006 and TFTestkits TF-100; utility water; summer: automatic; winter: automatic; ; PF:7.5
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