I thought I put one in it, but it had been so long since I had it apart I had to go look. In the process, I remembered something I didn't like about it. How it comes apart was a little confusing, so, naturally, I went insane with a pair of pliers and broke the glass only to re-discover it's really simple. I was too smart for it by half. The long and short of it was that it still had the original coil in it and still working great, but I can't see any reason why the cCells wouldn't work when comparing the coils side-by-side.
Now, excuse me while I go concoct a story to feed my wife explaining how her tank got broken, before she gets home. I'm thinking of going with the simple "Well, hmmm, that's weird..." line of defense.
Crap, Bro... I didn't mean for you to go gettin' yourself in trouble to answer a question.


Thanks for all the responses, everyone! That's awesome news. I have a friend who just got a Pico and the Melo 3, and I told her that I thought the cCells would work in it. Good to know that I didn't steer her wrong.