Poor mash efficiency - Is pH 5.7 too high?

[jat147]

Yeah sorry for the confussion, it was wheat malt I used.
Darkonnis: The mash was 90 mins, as always. I have always suffered with 60ish figures when making Weizens but I've always told myself that was due to the aged coolbox mashtun - now I've upgraded to a circular SS pot with a rotating fly sprge arm I expected the extraction to go up - not stay static.

I'm pretty sure that pH isn't the main problem anymore - the grain crush seems more likely. Both the wheat and the lager malts came frm new sacks from Muntons (not sure what their crush size is?). I know the finer particles sink to the bottom, so maybe the extract will go up as te sack empties? I'd love a grain mill, maybe I should push that one higher up the wish list?

[zgoda]

Wheat malt has to be cruched much finer than barley. Grains are smaller and standard mill gap leaves too large particles. I'd check this.

As for grain crusher, Brewferm has some in offer, like the one at Brouwland web shop -> http://www.brouwland.com/shop/product.a ... &dt=24&l=2

I have very similar but Czech made (was much cheaper, half the price). Small, sturdy, unbreakable. Crush quality is "good enough".