Hot tub with Ozone and SWG target numbers?

[Isaac-1]

I know I picked a bad time with the outage this weekend, but it looks like I will be getting a used hot tub this weekend, price is right, nice tub, lots of those bells and whistles. Anyway I need some start up target numbers, this tub has both an SWG and a UV Ozonator (may need new bulbs). As most of you know already, I have the pool chemistry basics already covered, just need the post it note condensed version for hot tub for now, I have copies of some of the stickies already, but they don't cover SWG on hot tubs.

Ike

 

[jblizzle]

I am not good with these yet either. I would think the levels are the same with the exception that the CYA can likely be lower since it will normally be covered.

 

[Isaac-1]

Ok, here is another question, is there any reason to not use my pool water as a hot tub fill source? It is kept at a CYA level of 20-30ppm

Ike

 

[chem geek]

Sorry that no one answered your last question and I didn't see it until now. You can use your pool water for your hot tub so long as the CYA level is kept lower as in your case and when the CH isn't too high. The hot tub temperature is hotter so if you have a CH level in the pool that saturates the water with calcium carbonate, then in your spa that may be too much though usually you try and have your TA lower in the spa so that may compensate.

 

[Isaac-1]

My fill water CH is usually around 80 ppm, but is likely a bit higher in the pool (I have not tested CH in a few months, but would guess it is in the 120 range)

 

[linen]

120 should be fine

 

[Isaac-1]

Hmmm, I wonder if there is such a thing as filling a hot tub too fast,

I have an emergency fire hose valve and fire hose for my pool plumbing