Hi,
This forum seems active so I hope someone will have the magic answer to my problem.
I have a 10 000L fibreglass pool. Since this Spring's openning, I had the same problem occur 3 times: the bottom of the pool turned yellowish and trying to rub it out would not work. Here is what happened.
The rep suggested to add Alkalinity: 1kg. My spouse started 2 days ago with a third of that, just in case...
Today, the Dang yellowish-brown stain is back, but lighter.
It seems to me that my pool does not like alkalinity. Any suggestion ?
--
Mel T.
Montreal
This forum seems active so I hope someone will have the magic answer to my problem.
I have a 10 000L fibreglass pool. Since this Spring's openning, I had the same problem occur 3 times: the bottom of the pool turned yellowish and trying to rub it out would not work. Here is what happened.
- openned the pool with chock treatment. Water cleared but walls and bottom were yellowish-brown.[/*:m:3qsmhsxr]
- was told to add muriatic acid. I added a full gallon (I was mislead into putting it all) after waiting that chlorine went down [/*:m:3qsmhsxr]
- Pool turned crystal clean and water was very inviting. But PH was of course amazingly low.[/*:m:3qsmhsxr]
- I was given indication to add PH, alkalinity, and calcium harness. I followed instructions well.[/*:m:3qsmhsxr]
- 2 days after, the yellow-brownish stain was back all over the pool, but more on the bottom.[/*:m:3qsmhsxr]
- Tests did not indicate any metal in the water.[/*:m:3qsmhsxr]
- I did another treatment with acid muriatic and stains disappeared right away.[/*:m:3qsmhsxr]
- I emptied the pool and left around 15% of old water (can't remove all in these type of pools)[/*:m:3qsmhsxr]
- Filled with brand new Montreal water.[/*:m:3qsmhsxr]
- Retested with home drops and had to add some PH+.[/*:m:3qsmhsxr]
- Resumed using chlorine "pucks" with stabilizer with very small opening in distributor (it takes a week to dissolve and chlorine tests show perfect balance).[/*:m:3qsmhsxr]
- enjoyed pool for 2-3 weeks[/*:m:3qsmhsxr]
- Went to perform a test at store. It indicated:
[list:3qsmhsxr] - Temperature: 27.8C
[/*:m:3qsmhsxr] - pH: 7.4
[/*:m:3qsmhsxr] - AT: 70 mg/l
[/*:m:3qsmhsxr] - DC: 140 mg/l
[/*:m:3qsmhsxr] - CYA: 25 mg/l
[/*:m:3qsmhsxr] - C.L.: 2.00 mg/l
[/*:m:3qsmhsxr] - C.T: 2.00 mg/l[/*:m:3qsmhsxr]
The rep suggested to add Alkalinity: 1kg. My spouse started 2 days ago with a third of that, just in case...
Today, the Dang yellowish-brown stain is back, but lighter.
It seems to me that my pool does not like alkalinity. Any suggestion ?
--
Mel T.
Montreal