Kem Tek 338 vs Jack's Magic Purple Stuff in salt pool?

[JimK]

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Also, if the bucket test for metals comes back negative (I'll know tonight), perhaps I can also stop, or greatly reduce, the addition of the sequestrant (Jack's Magic Purple Stuff).
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Ben, when I checked the bucket this evening the water was still cloudy from the addition of washing soda. When first I started the test and added the chlorine, the water got cloudy, but cleared the next day (I didn't see any staining or sediments). When I then added the washing soda, it got cloudy again, but this time it has not cleared after more than 24hrs so I cannot see if there are any stains or sediments.

Any suggestions on how to proceed?