New user & new salt pool owner

Sep 12, 2015
1
New Orleans, La
Hi everyone,

I have a 20,000 ga salt water pool that is about a year old. Recently, I started noticing stains on my white plaster. It turns out that they are Copper Stains. I used a metal product to remove the copper & balanced my pool perfectly per the instructions of Jacks Magic Purple Stuff. I was told to use 1 bottle of Jacks Magic Purple stuff to remove the stains. However, its been 13 hours since I poured the purple stuff in the pool with no improvements. How long should it take for the product to start working?