I'm working on Borating my spa, I find the pH is drifting high when I'm away for a week at a time, I turn the air off, but I assume this is normal due to aeration present just from the pump running? Also I guess the occasional bleach addition brings it up? I am also interested to see what effect it has on the somewhat intangible water "sparkle".
I have a Freeflow Solstice tub, it is listed as water capacity=340 gal. Is this the number I should be using to calculate volumes, or is this the volume to the brim, and it is always less than this?
I did manage to find some 20 Mule team Borax in a quite small local general store after being stumped by several big grocery stores. All I have to bring the pH back down is "Lo and Slo" from Spa Guard. I believe this is dry acid, but I'm not sure of this. I've got the Lamotte Borate test strips, for some reason I have yet to discover it was packaged with some Sulfuric acid reagent, but I don't see anywhere to use this as part of the test.
I've been reading the threads I can find, but still have a few questions.
Is my target 30 or 50ppm, (or anywhere in between)?
How much Borax to achieve this in the solstice?
How much lo and slo to bring PH back down?
What order should I add stuff in?
What will this be expected to do to my TA and CH?
I am of course asking late, since I already have done this: Added 200g of Borax, tested around 30 ppm borate I guess, test strips are a bit tough to read. pH was very high, at least 8. Added 150 g of lo and slo ( based on a rough guess from an acid demand test and the charts in the Taylor manual). I added it all at once, which was silly, as the pH went to 7.2, but I have just left it to aerate back up. I haven't had a chance to check TA or CH yet.