Thanks. I appreciate your efforts and look forward to hearing your successes.

I'm going to take my next step, add the AA.

This time, perhaps, Since my CYA is lower, it will be easier to raise the FC to shock level quicker, which may deter the White Cloud.

Wish me luck. (The filter came with the pool so I'm hoping it was sized right) I know others with the same pool and they don't have these problems. The only difference is the water.

Since I had the purple hue, I did some Internet searches and came up with references to Manganese. Does anyone have any experience with this in their water?