Re: White scale in fibreglass pool
PoolGuyNJ said:
When a F/G shell is limed up (calcium scale) like the one in the picture, it didn't get that way quickly and nor will the cure. It formed because calcium got in the pool and CSI was positive for a lengthy period of time.
If you have a heater, its best to take it out of the water loop.
Drop the pH to about a 5 or so and run it (no swimming!). This will slowly dissolve the calcium that coated the shell over a period of days. Normal pump run times are used.
Expect the CH level to rise.
Check the hardness of the fill water.
Dilute the pool as needed. Never exceed more than 50% at a time. If you have a high water table, don't exceed dropping more than 25% unless you have a dry well/sump and can pull any water out from behind the shell.
Try to get the CH level under 300 ppm. Target the CSI to be slightly negative and scale can't form. Recoonect the heater once the pool is rebalanced.
Scott
Ok this I can try with my limited skills.
I can bypass my heater.
Drop the PH to 5%.
Run the pump on normal times.
I should expect the Calcium hardness to rise.
And here is where you start to lose me.
Check the hardness of the fill water ? That one confuses me . Am I filling the pool with fresh water ?
I am confused with diluting the pool as needed never exceed more then 50 percent at a time ?
I do not have a dry well / sump, I would guess my water levels are low in my area. I live in California in a warm valley, for 5 to 6 months we do not have any rain, when we dug the hole for the pool the soil was very hard clay.
I understand getting the Calcium Hardness level under 300 ppm,
The CSI I need to read up on not sure what that is.
My understanding is I am dropping the ph down to 5 and by pass the heater and circulate the water the other parts after that I am not clear on what exactly you want me to do.
This sounds like it's going to work and I want to try it.
I just want to have a better understanding of your instructions.
Also keep in mind I am new to this and a bit slow.
I do appreciate your help
Looking forward to hearing back from you.
Mark