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

[JimK]

You did the bucket test. You added bleach -- to break down any phosphonates, and then oxidize any metals to the insoluble form, and then soda ash, to raise the pH to the point where they would precipitate.

Colors tell the tale: iron would make the sediment brown or orange; copper blue or green, or maybe black. You got tan. That means calcium plus maybe a tiny bit of iron. You *might* have other metals, but it's unlikely.

Thanks Ben. Actually, the sediment is white. I take this to mean it's not likely I have any metals and that adding the sequest isn't doing anything?

If I wanted to later test for metals using a Taylor kit, how long should I discontinue sequestrant use before testing to be sure the sequestrant doesn't interfere with the results?