Im very new to dats and and curious on their general behavior. I thankfully received some advice from this forum on feeding, but am wondering if they always hide. I never see them out, my 3- 2.5 to 3 in dats all cram into a 6 by 8 in cave. Is this normal? Should i remove the cave, what should i do to increase activity...water params, temp etc. is all great...please let me know.