What??? I have a huge power head in my tank and I've watched one swim into it 2" away for at least 20 min straight! Hope they keep it up.Most active cats youve ever seen?....have all the other been dead? Mine is 9-10" I maybe see him move once every other day. Not gunna lie though even sitting still hes close to my favorite fish....just so cool
They should move a lot by nature.
Watch out for aggression. In a small tank, they will fight, sooner or later. It may come unexpectedly - fine for days, weeks, months and then you wake up to one being in the mouth of the other. Been reported plenty. I've seen it personally too. They are solitary, territorial fish, not social. They are very resilient and do come back from horrifying wounds too, not that this should make it right.