I just bought a yasha goby and candy cane pistol shrimp for my nano who instantly paired up as expected. They started making their burrow in the back of my tank in a spot that was unexpected. Just wondering if they move spots or it's permanent since they chose a spot that is very difficult to see even from the side. Also if they don't is there a way to have them burrow in a preferred spot? Whatever the case may be they are super cool, yuji the goby and Todo the pistol shrimp