Terv

The following in blue is an excerpt from a reply from Chem Geek, Wizard of Water: "Saltwater chlorine generators do not drive up pH directly. They produce hypochlorite then when it becomes hypochlorous acid it increases pH but then when that hypochlorous acid gets used/consumed it lowers the pH back down. What can happen is that some undissolved chlorine gas from the generator outgasses and that will raise the pH. Also the increased aeration from the hydrogen gas bubbles will increase pH from carbon dioxide outgassing. As you point out, the higher TA increases this carbon dioxide outgassing. That's why those using either bleach or a saltwater chlorine generator and maintaining a lower TA of around 50 ppm are able to have much more stable pH though they also use 50 ppm Borates for additional pH buffering to make up for the lower buffering from the lower TA level. So yes, lower your TA, but not just to 80 ppm but to lower than that and use 50 ppm borates (most easily added from boric acid) for additional pH buffering." My water out of the tap is: TA - 50 ppm pH - 7.7 CA - 50 PPM I will follow Waterbears recommendation to balance pH and TA. 1. Add acid to lower your PH to between 7.0 and 7.2 (this also lowers TA) then test your TA 2. Aerate until PH rises to around 7.6 (the only way to raise PH without also raising TA) Repeat steps 1 and 2 until you reach the desired TA. QUESTION: Will the Dichlor/Bleach method for a salt water chlorine system work equally well with a salt water bromine system? QUESTION: Will a TA between 50/60(minimum set by the APSP) ppm & 80 ppm offset with Borates (boric acid or borax/MA or Gentle Spa) help reduce the pH rise in a spa sanitized with BCDMH bromine pucks? Or is there some reaction between borates and cyanuric acid that affects pH?

Is there a health downside to CYA? Based on water feel, safety and maintenance would you choose saltwater chlorine or saltwater bromine? Or is the nitro/chemgeek chlorine method simply hands down the way to go?

I asked Del Ozone why ozone is not recommended to be used with bromine except in residential spas. Why is it safe for residential spas? No reply as yet. Most information I am finding on UV-C light is in combination with chlorine, very little talks specifically about bromine. No explanation why from Delta UV. I do not understand why both ozone and UV-C light are recommended for hot tubs using chlorine when chlorine performance declines at spa temperatures of 100F. So, I turn my attention back to the basics for my new replacement 325 gal hot tub with 24/7 filtering. I am thinking no secondary sanitation because the design application for each individual hot tub should be specific to achieve effective results. IE ozone system designed and field tested for my specific hot tub proving no ozone reaches the water surface. I have been told that the electrodes in salt water systems drive up the pH levels. But after reading the Chem Geek's posts, I am wondering if it is the TA. QUESTION: If I order a salt water bromine system for my new spa and lower the TA to 80ppm (my previous target was 110ppm) will the salt water generator increase the pH or will the lower TA decrease the rate of pH increase? For water quality and safety what is the best way to sanitize a hot tub?

I asked Del Ozone why ozone is not recommended to be used with bromine except in residential spas. Why is it safe for residential spas? No reply as yet. Most information I am finding on UV-C light is in combination with chlorine, very little talks specifically about bromine. No explanation why from Delta UV. I do not understand why both ozone and UV-C light are recommended for hot tubs using chlorine when chlorine performance declines at spa temperatures of 100F. So, I turn my attention back to the basics for my new replacement 325 gal hot tub with 24/7 filtering. I am thinking no secondary sanitation because the design application for each individual hot tub should be specific to achieve effective results. IE ozone system designed and field tested for my specific hot tub proving no ozone reaches the water surface. I have been told that the electrodes in salt water systems drive up the pH levels. But after reading the Chem Geek's posts, I am wondering if it is the TA. QUESTION: If I order a salt water bromine system for my new spa and lower the TA to 80ppm (my previous target was 110ppm) will the salt water generator increase the pH or will the lower TA decrease the rate of pH increase?