Test results after ascorbic acid treatment (and one extra stain Q)

[sarahebeth]

Hi. We've had our pool for about a year. Over the last few weeks we started getting brown stains. After testing with Vitamin C, we knew it needed an ascorbic acid treatment which worked perfectly (on 7/5). We followed it with a chelator the next day.

Today we tested the water and here are our results. What do we need to do next?

Pool is 8000 gallon free-form, gunite, has a SWG and sand filter.

Ascorbic Acid treatment on 7/5
Chelator 7/6

Tested water 7/7
Cl- 1
PH- 7-7.2
Alk-70 ppm
Total Hardness 150ppm
CYA: under 30 (that's the lowest our test would read)

This is our stain before, gone now.


And, what are these white spots? They were there after the initial plaster job, then we had it acid washed in the spring and they were gone...and now they are back. The bottom of the pool is streaky with them, too.


Sent from my SAMSUNG-SM-G920A using Tapatalk

 

[pooldv]

I would raise CYA to 70 or 80 and keep FC above minimum at all times to avoid algae and having to SLAM which will likely bring the stains right back. [FC/CYA][/FC/CYA]

You need to raise CH to 250 ppm also.

Have you read this? Ascorbic Treatment to rid Pool of metal stains

You can add your pool info to your sig as shown here, Pool School - Read This Before You Post

 

[sarahebeth]

Here are pics of the pool tonight. The water LOOKS good (maybe the tiniest bit cloudy)...but it looked good when we got the staining, too.





Sent from my SAMSUNG-SM-G920A using Tapatalk

 

[sarahebeth]

I would raise CYA to 70 or 80 and keep FC above minimum at all times to avoid algae and having to SLAM which will likely bring the stains right back. [FC/CYA][/FC/CYA]

You need to raise CH to 250 ppm also.

Have you read this? Ascorbic Treatment to rid Pool of metal stains

You can add your pool info to your sig as shown here, Pool School - Read This Before You Post

Thanks for your response. Yes, I read and followed that thread for my AA treatment. Just trying to get the next steps right.

I also added my pool info to my siggy.

Sent from my SAMSUNG-SM-G920A using Tapatalk