Is a good product an very helpful to adjust ph on mash

I use this to acidify my alkaline (native) sparge water and avoid tannin extraction during sparge.

Good for adjusting ph

Just what I needed to get my PH where it needed to be at 5.6 PH Would recommend this product

Given my municipal water profile I wouldn't brew without this stuff. Controls PH effectively and easily.

I use this product fairly regularly and find its addition to be predictable and consistent.

Effectively lowered my mash pH to 5.2.

PRODUCT IS AS EXPECTED

I use this to drop the pH of the mash. I've also used this to sour a Gose and it worked really well.

Used it to pre-acidify my wort for a kettle sour. Worked exactly as intended preserving head retention. Definitely recommended for this purpose.

I just started using this to adjust pH. 3ml was enough to drop the pH of my mash from 5.7 to 5.4. Tasted it once too. I have never tasted so intensely sour.

Just used this to sour a Gose without bugs. Turned out great.

My homebrew has really improved once I started adjusting my mash pH and building my water. My efficiency went up and it just plain tastes better. Because I started making both of these adjustments at the same time it is hard to pin point which one made the biggest differene but my money is on fixing my pH.

I use this to adjust pH during the mash. Just as others have noted if you add too much you will sour your beer. A little goes a long way and make sure to wait a while before checking pH again.

I bought this to add a hint of sourness to a stout without having to deal with bugs or a sour mash. I tried to read around an ounce of the acid per 5 gallons of beer seemed like the consensus. Well that is WAY too much. I ended up with ten gallons of lemonade-sour beer. So learn from me. For a five gallon batch of beer a quarter ounce will give a hint of sourness. A half ounce will give a noticable sourness (too much for my taste) and anything more than that is a mistake. I have no experience using this for mash PH adjustment.