Leisure Time ALK Alkalinity Increaser for Spas and Hot Tubs, 2 Pound

Only alkalinity booster we will use with our hot tub. Works more consistently than other products that we have used.

It is a good value and works in the hot tub just fine. Do not know what "sheer" or "warmth' means in the ratings. Works fine, no problems , good price, fast shipping, is as described

Great product from leisure time

I was looking to order some sodium hydrogen bicarbonate - what my spa chemicals call "total alkalinity increaser" - this is sodium bicarbonate. It is more of a straight pH increaser. You get less bounce with sodium hydrogen bicarbonate. Just an FYI so you know what you're getting. I'm sure it is still a great product, just not what I wanted. Should be more explicitly listed somewhere on the description on Amazon - or perhaps I just missed it.

I love leisure time chemicals, I use this after testing the water and the alkalinity level is low. Overall the new bottles arw the same size as the old, still the same quality and performance as the previous packaging

does a great job

I use this brand because that is what our dealer recommends for our Hot Tub. The product is very easy to use and a great value compared to what I would pay for the same at our local dealer even with our discount. Not sure what is meant by softness is why I did not rate it.

Most alkaline boosters I found came in large quantities that were great for swimming pools, but way to much for smaller volume hot tubs. As Goldilocks might say, "This is just the right size for what I need."