yes that would be a good sign.. At night you will notice when they go to "sleep" the will shrink up and possibly lay down.. About an hour or so before the lights come on you will notice him getting up to stand tall... Mine shrinks down to about 2 or 3" at night and is well over 8" during the day.. Its becoming time where I think I am going to chop him up and spread him as by x-mas he will most likely be out of the tank.. BTW
it will take a few days or so before he looks like he did in the LFS
... Very Interesting softie...