Thought I'd update because something awesome happened!
But first an update on where I was up until around 2:00 this arvo.. Everyone from the 120ltr are now in the 170ltr, I've got the 80ltr in my yard I've just got to get around to cleaning it out
Secondly, we've've asked around all the fish shops and no one can get me any fish from central Africa that aren't catfish, cichlids or damn Congo tetras

So I'm going to just go with syno species tank, I hope they like it

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I've also got two more little synos in the 170 now that I've had for a while named Mike and Salem. Mike is very dark and has much more brown than Felix, and Salem is very light - he's absolutely beautiful!!!
It was also probably a blessing in disguise that the shops couldn't get me any little fish, someone in the 170 has murdered 3 minnows, so the other 2 are now in with Miles in his 50ltr, I know its small for them but at least they're not being eaten!
Now - and here's the best part - we got the best deal on a 4'x2'x2' tank today! $200!!!!! Down here you can't get a 150ltr for that, even if it is second hand! HELL YEAH!!!!! Its been drilled for a sump so we're hoping to use the 170ltr as a sump for it (170 has also been drilled but my hubbys blocked it off) so that'll be interesting, but once he's worked that out, I'm guna put my synos in it!!!
That being said, how many synodontis nigriventris can live comfortably in a 4'x2'x2' tank? I was thinking (hoping) around 15-20, probably 17ish... Is that to many? I don't want to crowd them in there, do you guys think they will be happy with that many in there? Or is it too many?
Thanks.