The shell is not the problem. I stuck a gloved hand there and the shell just came away. I guess it got stuck to the foot as the foot came up. There has been a change in the flow in the past week, so maybe that's it.
I've had it completely submerse under the sand when scared e.g my fat hand hits it when in the tank doing maintenance, but it always comes back out after some time. I've seen it curl into a ball for a period of time (which it did last night) only to completely open again a few hours later.
There are days when I thought it was getting too big for the tank when it would stretch out and take over the entire corner of the tank.
This is a new one.
I just checked the water params and might as well post the numbers
- 1.7 meq/L
3 - 5 ppm
.03 or less
being done tomorrow (15% 2x/mo)
Light bulbs to be replaced before or on New Years