what the hell

[grainbelt]

Pretty pale grist. What water were you using? Mash Temp? If it was 147 ish it takes much longer than 154 especially with a high mash pH.

water was
Na 6
Ca 12
Mg 15
TOtal Hardenss CaCo3 93
SO 15
Cl 13
BiCarbonate 72
Total ALk 69

I was mashing high for a sour
I mashed for 60min

[grainbelt]

I would say ur refrac or hydrometer was off or ur math may have been wrong. Could also be the crop of grain

I checked my refractomer after and it is fine. Went over my numbers in beersmith to and it figures right

[EagleDude]

you didn't by chance add your sparge water and vigorously stir it while still keeping the valve open ... thus collecting mostly water instead of rinsing the sugary goodness from the grains?

[Grandpa]

Pretty pale grist. What water were you using? Mash Temp? If it was 147 ish it takes much longer than 154 especially with a high mash pH.

water was
Na 6
Ca 12
Mg 15
TOtal Hardenss CaCo3 93
SO 15
Cl 13
BiCarbonate 72
Total ALk 69

I was mashing high for a sour
I mashed for 60min

If I'm mashing german pilsner malt at 148°F, I usually don't see full conversion, using an iodine test, for 90 minutes or longer.
My mash pH is sometime low at about 5.1 @ room temp.

[grainbelt]

you didn't by chance add your sparge water and vigorously stir it while still keeping the valve open ... thus collecting mostly water instead of rinsing the sugary goodness from the grains?

ha nope