I was just wondering if you guys ever do anything like this:
Firstoff, I mash in my kettles and just add direct heat to keep the mash temps constant. Then I dump the grain into my false-bottomed MLT and drain/sparge there. That's all standard issue. So, whenever I brew 2 grain batches side by side, I'll drain/sparge the lighter beer first, and then, I'll pour the mash from the second batch directly on top of the first batch in the MLT. One reason is because I'm lazy and I don't feel like emptying out the MLT. The other reason, as far as I can figure it, is that I might pick up some remaining sugars from the first batch.
Is this cool? The one thing I worry about is fluctuating PH, but I never check my PH anyway, so who knows. I was just curious if this is an okay thing to be doing.