Great Answers to
Questions About Everything


So I've been doing all grain for quite some time now, but I've always "winged it" in regards to my water chemistry. I've been using a mix of Reverse Osmosis and Spring water, which gives good results for pale beers (hefe, lagers, blondes), but my darker beers and IPAs have sometimes come out a little astringent. I suspect my mash pH isn't being controlled properly and so I want to figure out how to monitor and control my mash pH.

So what kinds of tools do you guys use to (a) measure your mash pH, and (b) correct pH when needed?

How reliable are those little pH strips vs a "real" pH meter? If I need a real meter, can I get one of the $20-30 ones, or are those a waste? The meters get pretty expensive pretty quick and I have no idea which one I need.

Are pretty much all mashes supposed to be around 5.2 pH? I'd love it if someone could chime in with the appropriate pH range, and what they do to correct their pH if its over or under their target?

{ asked by Graham }


I used strips for years before I got a meter. They can work well, but I recommend only using the colorPhast strips, which are pretty expensive. The cheaper ones just aren't accurate I've found. I now use pH meter. Don't get a cheapo meter...you'll just be wasting your money. Your pH should be 5.2-5.4 measured at room temp (around 70F). I use lactic or phospohoric acid, gypsum, CaCl2, CaCO3 and pickling lime mainly to adjust the pH. You shouldn't mess with pH or water treatments, though, without getting a water analysis to know what your starting point is. I recommend www.wardlab.com for water testing. Get test W-6 which runs about $16. If you email them and tell them you're a homebrewer they have special instructions and info available. I also recommend you download the free spreadsheet at https://sites.google.com/site/brunwater/ . Not only does it help you calculate your water additions, there's a greta section of water info included with it.

{ answered by Denny Conn }