Tom, they look awesome. I may have missed this elsewhere, but can you tell us your water params? My Krobia are flirting again in my 150 but they always drop their tubes and then refuse to go further. I'm looking for a trigger.
Does your GT bother the Krobia or the Mesonauta at all? Also, where are the nassa? I've decided to go with Aequidens metae, Acaronia nassa, and Krobia in my new 150 that I'm setting up.