rabbut
I don't bite, all that often...
Neon Gobies will be fine in 240l, they are amongst a few fish that are OK in tanks less than 10G, you you've plenty of room for a pair As for a group, well, now I think you may be pushing it as you need to treat groups of neon gobies like Clownfish... 8+, singly or in pairs...
I thought that 240l was way too small for a Yellow Tang. Put it another way, if any customer at work wanted a yellow tang for a 240l tank, I'd refuse sale... Really, they need a 4X2X2, or 80g/350l as a minimum, due to their size and activity (they are very active fish) A 6X2X2 would be far better however...
All the best
Rabbut
I thought that 240l was way too small for a Yellow Tang. Put it another way, if any customer at work wanted a yellow tang for a 240l tank, I'd refuse sale... Really, they need a 4X2X2, or 80g/350l as a minimum, due to their size and activity (they are very active fish) A 6X2X2 would be far better however...
All the best
Rabbut