Lungs do not need big tanks i agreeI though they only need 100 gal. I read about it on the sticky.
and IMO a 110 will be fine...P. anetecens over 36" are pretty hard to come by and will take many years to outgrow that 110 if they even ever do. my WAL was 33" at 10yrs old. Got some close up pics for u of the sensory pits also. had to do some digging through old photos. Before i got rid of him he was actually in a 110gal tub roughly 30"x4'... id say a 75gal footprint 48"x18" is bare minimum for these guys solo... they turn and get around just fine. dont move much either.