Is this calcium build up?

[MRBDDB]

I've been fighting this on my pool floor all summer. I've had high PH way over 8. Now it's around 7.2. I've tried brushing this and it won't budge nor will it vacuum. Could it be calcium? It's all over my pool floor. If so how do I get rid of it? Here is my full set of results.

CYA 50
TC 8
FC 8
CC 0
Cal 500 PPM
TA 180

 

[mknauss]

Most likely.

In PoolMath it calculates CSI. Read Pool School - Calcium Saturation Index (CSI))

It will slowly dissolve if you keep your CSI in the negative range. But to do that with your CH, you will need to be very diligent on keeping your pH low (7.2) and TA low (60 or so). Daily testing of pH.

 

[MRBDDB]

How do I get my CSI into the negative range? Is my TA too high?

 

[mknauss]

Yes. If get your TA to 60 or so and keep pH in low 7's, your CSI will be negative.

- - - Updated - - -

Is the calcium from your fill water or from Cal Hypo use?

 

[MRBDDB]

It's not from Cal Hypo, I've never used that. I thought it was from having high PH. But I guess it could be from my fill water.

 

[mknauss]

Test your fill water. pH, TA, and CH.

 

[MRBDDB]

Ok, will do, thanks!