You can try this test for metal stain. Place a vitamin C tablet on a stain in calm water (shut pump if needed). Check under the tab in a few hours, if the stain under the tab is lifted, it is probably metal.
You can try this test for metal stain. Place a vitamin C tablet on a stain in calm water (shut pump if needed). Check under the tab in a few hours, if the stain under the tab is lifted, it is probably metal.
Last edited by Watermom; 05-05-2014 at 02:32 PM. Reason: fix typo -- "lab" to "tab"
12'x24' oval 7.7K gal AG vinyl pool; ; Hayward S270T sand filter; Hayward EcoStar SP3400VSP pump; hrs; K-2006; PF:16
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