Yep, what Jan said --- especially if you get pretty consistent readings when the test is repeated.
Yep, what Jan said --- especially if you get pretty consistent readings when the test is repeated.
Is there another pool store to try? Would be interesting to see how the stores compare to one another.
Al
16'x32' oval 22K gal IG vinyl pool; ; Hayward S244T sand filter; Hayward superpump 1 HP pump; hrs; K-2006; PF:5.5