When I had a Betta, I'd give the crickets some of the pellets too. I give them some regular fish flakes when I can't get them any other food. I was using ground up hermit crab pellets for a bit too. They need much more water with the powder though. I've been putting in grapes for added water and just started giving oats to see if they'd eat them. I also gave floating sticks I used to feed my tadpoles, the crickets loved them.