So I made this big-ass starter, 3.5 liters, to hopefully come up with a little over 320 billion yeast cells for my 1.068 OG beer I'll be brewing on monday. I pitched the starter on wednesday morning and its still bubbling away, I expected it to be done by now. It has however, appeared to clear a bit. Is this length of time normal? My usual 1 liter starters take like 2-3 days.