@Fish Styx
My understanding is that some tangs like nasos are better kept in even larger tanks. Best to check with the tang experts!
Hey there,
#Heathen! Thanks for the tag. To give some feedback to the OP,
@unbeknownst -
Unfortunately, the dimensions of your tank will not responsibly house either of those specimens, let alone both together. Remember that these fish are incredibly active swimmers and need room to turn and maneuver through / around the aquascape. The width of your tank will not allow for that.
Length-wise, a 72" tank (180) would be okay-ish for the Blue Hippo, but that Naso needs an 8-footer. Keeping them in anything smaller is irresponsible husbandry, IMHO.
Now, all that being said, your tank can still have quite a nice lineup for your tang gang!
Smaller
Acanthurus sp. like a Chocolate and Lavender, mid-sized
Ctenochaetus sp. like the White Tailed, and a
Zebrasoma sp. like the Yellow, would all be appropriate for the dimensions of your enclosure. In fact, those four would be my personal choices, but I'm biased because they are all members of my gang. Lol
Hope this helped. Feel free to hit me up with any other questions.
Happy Reefing!