I have had my GBTA since March and it has'nt stopped moving since. it looks healthy,is eating. The rock I have in my tank are not smooth,not really sure what kind of rock it is so my ?"s are the rocks the reason the GBTA is moving so much,is it looking for a smooth place to plant itself? I have adjusted the the flow,moved the heads so the water is'nt flowing anywhere the nem is.