Mbu sitting in one spot all the time......

[ben_mbu]

i have kept both fahaka & mbu

i wouldnt worry to much.

they tend to have a favourite spot. as for keeping it with tankmates im sure you will be alright.

I havn't kept rays with puffers yet. I dont really recommend it. But I can tell you that my puffer does the same thing. just hangs out in the same spot.

 

[6freddy8]

mine does the same thing for 2 years now once in a big while he will swim around but other than that hes in one end of the tank just chillin and i have put him in my out door pond for 2 summers and he does the same in there also the only time he gets up and moves is when the cray gets away from him he swims after him and back to his spot so i wouldnt worry to much....dont get me wrong i would like my guy to swim around more like the others i see