Has anyone had this happen before?! Recently got a BTA for our nano 20g. Currently housing three thin striped hermit crab thugs that our kids grandparents lovingly stole from the gulf (!), and a paired WG with pistol shrimp. BTA chose the pair’s cave entrance as its spot . Goby and shrimp seem pretty savvy about the distance. It’s kind of hilarious to see them all peering out. Look closely and you will see shrimp’s antennae between WG and BTA.