We are very happy with the tank, and i'm very much the perfectionist

the stone background is a 'Juwel Rock 600' its very hard to fit! + it doesnt really flow together, there is a large blatant join where the 2 meet

but nevermind!
As for the fish mixing etc. we've had the uraus for about a year now and have also had a frontosa, which we lost due to it getting swim bladder and didnt make it, when he was alive

he got on fine with the uarus and all the others we had at the time (moon light gourami, dwarf gourami, rainbow tetra, and many other placid fish) we were told at the shop that the frontosa would be too agressive, but we decided to try him in there anyway

and he was fine!
And finnaly the labs, they have been in the tank over a month now and are fine, all the fish keep to their groups and dont bother one another.
If you want to try something and are told "it wont work" try it anyway, you never know