Cool

Thanks for the responses.
My maths say it is too much of a squeeze to put
the loaches in the 6x2 with Clowns. So I will go for the 4x2.
OK so they like current, then I will build a 4' river manifold.
I'm not sure about dithers. I use glowlight tetras just to keep the upper levels of my tank alive but if I had my way, I'd keep species only tanks.
Yes I like the idea of species / region specific tanks too so I will use barbs for dithers. Also I really like barbs.
Danios, arulius barbs, filament barbs, torpedo barbs and other fish with streamlined bodies are suitable tankmates.
Blue, you mention Torpedo Barb. I interpret this to mean Puntius Denisonii. I would love nothing more than to include this species but dont they like cooler waters; max temp about 25 celcius??? Also why are fish with stream lined body shapes preferable? I really like Tiger Barbs. If I put about 8 - 12 in there would they terrorize my loaches?? The loaches take priority of care! Tell me what you think? Thanks.
PS, bslindgren, You kept Sterbai Cory's? You obviously have good taste!!