What are these Flakes?

[RexO]

Any idea, what are these flakes on the bottom of my pool?
FC 6
pH 7.7
TA 90
Calcium 300
CYA 70
Water Temp 83

 

[RexO]

OK...from other threads I can assume they are calcium flakes. But strange to me since the pool is balanced. Normally my TA sits at around 70 and I never see this even as the pH drifts up to a 7.9. But I added some Baking Soda a few days ago, more than usual so I ended up at 90 TA. Thinking I will keep the pH down around 7.5 until TA come down a bit.

 

[Jimrahbe]

Rex,

I show your CSI to be positive and if the pH goes up at all it will be more positive..

Try keeping you CSI at -.1 or more negative.

I get the same thing if I let my pH get too high for too long.

Thanks,

Jim R.