Staining on New Plaster less than a year old

[ahickman56]

Does anyone know what causes this? Is it poor plaster installation? I had problems with the PH being high in the beginning and after 3 months the contractor drained and acid washed off all the calcium scaling. The ph has remained balanced ever since.
I just tried Ascorbic acid and citric acid with no improvement. This is the readings post treatment with the citric acid.
FC .16
TC .16
PH 6.9
TA 53
CH 29
CYA 19
Iron .1
Copper .1

 

[PoolStored]

Welcome back!

Citric acid will consume more FC than Ascorbic. Both will consume your FC depending on amounts.

We don't trust pool store testing, it is notoriously inaccurate. If we made recommendations on inaccurate testing, we can do harm...we don't want no harm...

I recommend you get one of our recommended test kits. Link-->Test Kits Compared

As to staining, here is your guide.

Stains in Your Pool

The stained pool is beyond embarrassing. Our in-depth Guide to remove stains in your pool will help you to remove the stains and prevent them in the future.

www.troublefreepool.com