Dry Acid and Impact On FC

[LGLDSR73]

I had to add some Dry Acid to get the pH down. T/A, FC, CYA and other parameters were within TFP's spec. It dawned on me if adding the Dry Acid would have any impact on the level of FC?

I know the preference appears to be the use of Muriatic Acid. I've been told this is not really suitable for vinyl pools. Any feedback on that much appreciated.

Outstanding forum here, really is. Keep up the excellent work!

Thanks,

Skip

-------------
Intex 18 x 9 x 52" UltraFrame, Rectangular, ~4750 gal.
Hayward Sandfilter, Model T166
Sunlight hits pool from Sunup to Sundown

 

[ajw22]

From Recommended Pool Chemicals - Trouble Free Pool

It is best to use muriatic acid if you have a SWG. If you don’t have a SWG, and handling muriatic acid bothers you, you can use dry acid.

That said I have never heard of a problem using MA in vinyl pools.

Adding acid in either form has no effect on the FC.

 

[Danforth]

I’m not an expert on the site, but my personal experience has been that dry acid has had no measurable effect on my FC levels.

 

[YippeeSkippy]

Dry acid is fine to use with a vinyl pool that doesn't have a SWG. But Muriatic Acid works faster and is more predictable. I believe it may be cheaper too? Just stand upwind from it and you'll have no problems.

Maddie

 

[Griswald]

Last time I went to buy muriatic acid, dry acid was on sale so I bought it.

I see no difference from one to the other.

 

[Wobblerlorri]

I use dry acid because I'm scared of muriatic acid. I've had to use it once, and it had no measurable effect on my FC.

 

[LGLDSR73]

Thank you everyone! All of your input is greatly appreciated!

Best,

Skip

 

[LGLDSR73]

Dry acid is fine to use with a vinyl pool that doesn't have a SWG. But Muriatic Acid works faster and is more predictable. I believe it may be cheaper too? Just stand upwind from it and you'll have no problems.

Maddie

I will try the muriatic acid. I assume it's safe to swim when the pH level is within a safe range? I.e., no extended wait time?

Again, thanks!

Skip

 

[ajw22]

Wait 15 minutes after adding MA to swim.

 

[LGLDSR73]

Wait 15 minutes after adding MA to swim.

Thanks. What about for dry acid? That's all I have on hand right now.

 

[ajw22]

Same

 

[LGLDSR73]

Same

Thanks again!

Skip