My arowanas are over two feet long and very skittish and always jumping. I fed them crickets the other night and one jumped right out and on the floor. I anyone walks quickly by the tank they also jump. Everytime they jump though they keep messing up their barbels or if its really bad, they lose scales. When he jumped out he lost three. That was the first time he actually jumped out. The other times they just hit the top but cut themselves on the braces. Anything I can do to lesen the frequency of this other than getting a bigger tank or elling one? they are both in a 180 gallon right now and both are past the 2 ft mark.