Ahhh, must have been on the wrong thread. I just posted on your other thread bud.
This is the revamp. so, questions.... that liverwart on the surface?
(I'm assuming their lemon tetra?) do you find your shoal is multileveled due to the discuss vertical ranges? As opposed to say japes tank for an example, where (logically) they remain mid to high due to the larger Geo's on ground level.
There's nothing like keeping the smaller varieties balled up more in formations & on edge alittle, even when the larger species is non threatening.