Re: Green Algae, Sand Filter - Add D.E.?
Don't try to add DE to the sand filter while the algae is still green (alive). Kill it first then filter the residual. Enough chlorine along with brushing and removing any solids will kill the algae. How much is enough depends on your CYA level. once you know the CYA level, you can look up the shock level of FC needed to kill the algae on the Best Guess Chart here: http://pool9.net/cl-cya/.
Don't add any more stabilizer, it makes it harder to kill the algae.
To win the battle with algae, you'll need a Taylor K-2006 (or K-2006C) testkit. Strips will not do. Most other kits will not do. You can't buy a K-2006 in a store; If you buy one through the links on this page: http://pool9.net/tk/, PoolForum gets some coin to keep the lights on.
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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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