Here's a picture of the mixing bucket. I had scrubbed the thing (plus my powerhead and heater) spotless after my last water change.
I didn't test the Ca or Alk or even pH tonight... I'll try tomorrow (I'm too bagged to do it right now). It probably makes sense to test it on a fresh batch anyways because I presume the Ca and Alk will be less, after all this has been precip'd out. More interested to see what it mixes up at.
Incidentally the last water change (the one before this one) I didn't do the drill mix thing, I just let the powerhead do the mixing. Same thing. Course the heater is still there.
Oh right, I should go find a thermometer to toss in there and see what the temp is. I'll post back tomorrow maybe with that info.