I'm making a second bucket-in-bucket MLT for a friend and using slightly different buckets from what I used for my own (click here to see a pic of it without the inner bucket El Cheapo Mash Tun
). I noticed that these ones don't stack quite as tightly together as mine do and instead leave around 4-5 inches of space between the bottom of the inner bucket (or false bottom) and the bottom of the outer bucket (the one with the spigot).
Do you folk think this will cause a problem with efficiency and the mash as there will be water at least a gallon of water that sits down there having passed over the grain only once after mash-in?
We will be recirculating the entire first runnings if I have my way but I can't help but think that this might cause the grain on the top of the bed to be above water during the mash.
Due to the buckets' dimensions I cannot simply cut the structural rings off the top of the outside of the inner bucket to have it slide down further into the outer bucket but I could simply cut three inches off the top of the outer bucket so that the inner seats lower and closer to the spigot. My worry with this is that it reduces the outer buckets overall capacity and my mash might overflow.
In any case, there's no great loss as it was a cheap and fun DIY project but the stickler in me wants to build the best possible MLT from these buckets that I can.