Fermentation stuck on ay 4 and its my first all graon

cshulha · Oct 9, 2016

Hi everyone did my first mash in a mangrove jack mr smicoe with grainfather. I put some of my grains in 20mins late(newbie mistake) and the had let the beer mash for an extra 20 mins. I got og of 1.054. I put some yeast in the frementer it went crazy the first four days that gravity went to 1.025 and has stayed there for 3 days. Im at 23c. ANy advice. Did i not breakdown enough sugars in mash? do I need to repitch? by the way just had a sample it tastes great. THe mr simcoe all grain kit said my og should be 1.049

andrewf1985 · Oct 9, 2016

Are you measuring with a refractometer or hydrometer?

cshulha · Oct 9, 2016

andrewf1985 said:
Are you measuring with a refractometer or hydrometer?

I am using a refractometer

HerkimerBrewer · Oct 9, 2016

What kind of yeast did you use? I regularly use an english ale yeast that ends at about that, last batch was 1.022....so it might not be stuck, it might be done.

andrewf1985 · Oct 9, 2016

You need to use an online convertor to get the actual SG or buy a hydrometer. Refractometers dont work in the presence of alcohol.

kh54s10 · Oct 9, 2016

If you are using your refractometer for your FG measurement, you need to use a correction calculator. It does not read correctly with the presence of alcohol.

I don't know what is meant by "I put some of my grains in 20mins late" It would be a strange recipe if all the grains didn't get mashed at the same time. Though a more advanced technique is to add highly roasted grains later in the mash to reduce harshness.