Grain bed drainage and ph

[trimixdiver1]

So I did a Saison, 22lbs Pilsner and 2oz of chocolate rye for color. My mash ph was in the low 5.0-5.1. Usually I can get 1gpm plus to recirculate though the bed (HERMS) with Pilsner malt (same sack). This mash was at the same temp, same ratio, just ph and the rye are different.

So could a lower ph increase bed resistance or was it the 2oz of rye? I could only do
.3gpm.

Thanks

 

[ajdelange]

Rye is pretty syrupy for sure but I doubt 2 Oz in 22 lbs base malt would make much difference. Lower pH is supposed to improve runoff. Did you do a ß-glucan rest?

 

[trimixdiver1]

Rye is pretty syrupy for sure but I doubt 2 Oz in 22 lbs base malt would make much difference. Lower pH is supposed to improve runoff. Did you do a ß-glucan rest?

No glucan rest

 

[ajdelange]

Well if you didn't do a ß-glucan rest this time and got the slow throughput and did do a ß-glucan rest when you got the faster rate then that would explain it but if everything else except the pH and use of the 2 Oz rye was the same I can't explain it.