50 is plenty. But in my experience crickets are a pain to breed. Ditch the crickets and buy some turkistan roaches. They are the size of crickets and breed prolifically. And best of all, they are way better for your leos and run around attracting alot of attention to themselves. I just bought 1500 from a guy on faunaclassifieds.com for 25 shipped! Ill never have to buy feeders again, and will soon be selling them myself because ill have so many.