BartonMillBrewer
Active Member
- Joined
- Sep 4, 2020
- Messages
- 45
- Reaction score
- 31
Hi
Ever since I have been using my 30L microbrewery I have an issue with attenuation that I hope someone can throw light on.
I treat the water to get Ph of 5.5 and calcium around 80ppm.
My liquors are 17L for mash, 12L for sparge.
Mash temperature around 66C
I use around 5Kg of grain; at the moment Saaz and Maris Otter.
Mash time, 1 hour, boil time 1 hour.
Pitching rates typically 1 or 2 sachets at around 20C.
I use an Inkbird to retain temperature at 19C.
Gravity is read with a refractometer with a brix scale. I calibrate each time of use against water and use a hydrometer for confirmation.
Initial gravity, without additional sugar, around 1.045
Regardless of additional sugar, grain bill or yeast used my batches only ever attenuate to a gravity no lower than 1.020.
Previously I used grain in a bag in my Berco boiler type water heater and would consistently get final gravity of 1.005. This was without treating the water, suggesting the water is not the root of the issue.
Any ideas?
Ever since I have been using my 30L microbrewery I have an issue with attenuation that I hope someone can throw light on.
I treat the water to get Ph of 5.5 and calcium around 80ppm.
My liquors are 17L for mash, 12L for sparge.
Mash temperature around 66C
I use around 5Kg of grain; at the moment Saaz and Maris Otter.
Mash time, 1 hour, boil time 1 hour.
Pitching rates typically 1 or 2 sachets at around 20C.
I use an Inkbird to retain temperature at 19C.
Gravity is read with a refractometer with a brix scale. I calibrate each time of use against water and use a hydrometer for confirmation.
Initial gravity, without additional sugar, around 1.045
Regardless of additional sugar, grain bill or yeast used my batches only ever attenuate to a gravity no lower than 1.020.
Previously I used grain in a bag in my Berco boiler type water heater and would consistently get final gravity of 1.005. This was without treating the water, suggesting the water is not the root of the issue.
Any ideas?