The GBTA in my tank has split a number of times. I've also inadvertently torn one clone in half trying to get it out to pass on to another hobbyist. Unfortunately, the larger piece I gave him didn't make it, but the sorry remains of a piece that was stuck deep in a hole in my tank did! Quite amazing creatures.
I've found the time to split has varied considerably when mine has gone thru the process. Similar to what you may be experiencing, mine actually did tear itself nearly in half only to put itself back together. I swear there was only a small string still holding the two parts together & the next day it closed up on itself again. The mouth had been totally torn apart & it looked like a horseshoe. A few photos follow, not the greatest but I think you get the idea of how far it had gone before reversing the process. It then stayed normal for months before finally completing a split.
Should be able to see the foot at top left, bottom right fairly well here. It really anchors the opposite sides in order to tear itself in half.
Mrs. Maroon is wondering what's up. Have to say she was patient about the whole thing though.
Ya, not the greatest photo, but you can sort of see the horseshoe shape here. The open part of the horseshoe is what used to be the mouth.
