Hey group, I recently just purchased a Arctic Spa 6 person hot tub (2020). I have had it a month and I am treating the water the same way I do my pool, using the Taylor TF-100 kit. I did not add stabilizer but use 12.5% Menards Pool Shock each day to keep chlorine around 3-4ppm. I use Muriatic acid when the pH gets a little high. When I test my TA, I have had it register as high as 110 but then in a matter of a day or two, it drops to 30-40. I also notice a lot of foam bubbles when running the jets. I assumed this may be caused by the imbalance in the water. I have use the same methodology in my swimming pool for 10 years and it is always crystal clear and no issues with TA. I just tested all elements in the hot tub and FC was 4ppm, CC was 0, pH was 7.6, Calcium was 250 and TA was 40. Any thoughts on why my TA keeps bouncing all over the place?