New here and new to geophagus tapajos. Need some advice please.

[Def Leppard Hysteria]

If you see some differences in behaviour of your fish, please write about it here. I have big problem with behaviour of mine eartheaters. They are frightened when anybody move around tank.
I am thinking about some tetras too.

We have 35 Emperor tetras in our 300 gallon South American community tank, which includes 5 adult Geo. winemilleri. The Emperors are more of a shoaling fish and pretty much go all over the tank, but they have definitely made our Geo's less skittish than before.