see this thread:
What is the downside to holding FC a few ppm over target based on CYA level?
18000 IG, SWG, 1/2 HP Tri Star + Solar PV direct DC Lorentz pump, Sand filtrt
20000 gallon, Vinyl liner IG, SWG, Sand Filter, Hayward 1/2HP + Lorentz direct solar PV pump
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