crickets are a good food, high in energy and fantastic for aro coloration!
however their addictive, they do pollute the water pretty badly and the legs have hooks on them that can catch internally. (i have seen more then 1 aro die because a cricket leg got stuck in its gut, caused infection and death!)
I used to feed my oscar a ton of crickets..
when i got into feeding aro crickets, i got in the habix of freezing them and removing the legs before i fed..
I did however, encounter problems feeding my fish frozen bugs. I would recommend to that them first