Liquid chemicals, yes; dry chemicals, no. To test a sand filter, slowly pour a cup of DE (from pool store) into the skimmer with the filter running and watch the return. If the DE comes out the return, you have a problem with the sand filter.
Re: Is my sand filter working?
Liquid chemicals, yes; dry chemicals, no. To test a sand filter, slowly pour a cup of DE (from pool store) into the skimmer with the filter running and watch the return. If the DE comes out the return, you have a problem with the sand filter.
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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