WuhWuzzat Posted December 5, 2011 Report Share Posted December 5, 2011 For a new tub/fresh fill could one use the proper dosage of granulated CYA in lieu of Dichlor and begin using 6% bleach to chlorinate immediately? Seeing as I already have the bleach and CYA on hand, seems like this method would be easier or am I missing something here? Quote Link to comment Share on other sites More sharing options...
waterbear Posted December 5, 2011 Report Share Posted December 5, 2011 No reason why you can't but realize that CYA is very slow dissolving and might take a few days before it dissolves while dichlor is very fast dissolving. Quote Link to comment Share on other sites More sharing options...
chem geek Posted December 5, 2011 Report Share Posted December 5, 2011 I suspect that the CYA might dissolve faster at higher spa temps, but I don't have any real data for actual rate. You can, of course, measure the CYA within a day of adding it to see if it measures as you expect (let us know if you do this). The main advantage to using CYA rather than Dichlor is that you start off with a more consistent and lower active chlorine level so the spa water will be less harsh on your swimsuit and skin during that first week or so that you would have otherwise used Dichlor. Not a big deal, of course. The only reason we have the Dichlor-then-bleach method use Dichlor instead of CYA is that most people already have Dichlor and as waterbear points out, it dissolves readily. Quote Link to comment Share on other sites More sharing options...
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