LMH

Btw I did get rid of the foam and alkalinity is now at 120.

HELP PLEASE! I have a small 2-person hot tub. The water is only 6 weeks old and my pH/alkalinity is out of whack. I first adjusted the alkalinity down and was barely able to get it to the high end of the good range. Now I am trying to raise ph and it won't budge but is raising the alkalinity again. The pH remain between 6.2-6.4. Is it a lost cause? Do I need to change out my water? My local hot tub store guy said it was likely detergent that upset the ranges because I also have foam and that I need to change my water. I'm using Freshwater Brand pH/Alkilinity Down = sodium bisulfate and pH/Alilinity Up = sodium bicarbonate. Thank you in advance for any advice you can give me.