Final Gravity

I'm brewing a couple of ales and they have been in primary for over two weeks. They both reached FG (1.012) about a week ago but I'm giving them more time. After they reached FG, there's still some activity in the airlock. I see a small bubble about every five minutes. Is this normal? I thought the activity would stop after reaching FG.

Also, I plan to secondary and to try and clarify with some gelatin. I can't fit two 5 gallon carboys in my fermenting chamber. When I secondary, can I divide one of the ales into two smaller (3 gallon) carboys so they will all fit into the fermenting chamber and allow me to lower the temp into the 50's?

Bubbles don't mean much. You are likely just off gassing excess CO2. If your gravity numbers are constant, there's no fermentation happening.

(That said, final gravity numbers are just estimates, too.)

Thanks. What about using the smaller carboys for clarifying. Is it okay?

Sure, no problem.

Thanks