Spa aeration: pH rise... Natural equalisation?

[Daf-Tekno]

Hi TFPers,

I was thinking today:

1. If, in a Spa, aeration is commonplace
2. and such raises pH

would a happily-balanced Spa's pH naturally settled back down to its original lower pH if left alone for a set length of time,
or are we Spa owners always required to add Muriatic Acid / powdered equivalent on a regular basis to keep pH in check?

It just feels like I'm constantly fighting something as I keep having to add acid to the water.
Maybe it's just part of the job...

Thanks - D

 

[jojoman]

I don't think it will go down by it's self if that's what your asking.

 

[JasonLion]

For a standalone spa, you lower the TA until the PH is stable.

Once the PH has gone up, it will not go down again without adding chemicals.

 

[pooldv]

Here is a hot tub care article with a fairly in depth discussion of PH.
http://www.troublefreepool.com/threads/9670-How-do-I-use-Chlorine-in-my-Spa-(or-pool)