Hi. I just bought a 250gal hot tub and filled it with my hard but very good well water. Using 'Instatest strips' the alkalinity is in the 180+ range. As directed I've been adding pH decreaser (sodium bisulfate, " Proteam Spa pH Decreaser") by the tablespoon dissolved in water for two days now, probably over 10 tablespoons, and the Alkalinity won't fall into the desired 80-120. The pH is also on the high side (between 7.8 - 8.4) despite all the chemical although initially seemed to fall but now seems higher. Total hardness tested in the 250-450 range. I finally called the dealer who said it can take up to 5 days to lower the alkalinity and I should stop adding chemical and wait for it to chelate the minerals. I've reviewed TFP but couldn't find this specific question previously posted.
Any advice? Should I use something stronger to lower the Alkalinity? Should I continue to add more pH decreaser now? (I was told to first get the alkalinity into the good range then adjust pH as needed). I am planning to use Pristine Blue for sanitization and the tub has an ozonator.
Thanks in advance, very frustrated.