Thickness is no joke, he eats claws and all. ---------I also think they tolerate smaller fish better than fish that are larger than them. I put mine in a tank with a 10'' pleco and the pleco got a large chunk taken out of its tail with in minutes, from a 3'' fahaka. lol But i have had the fahaka for a month now and the 6 guppies are all still there and even a few fry.-----------------------------------------Also what is your substrate called and where did you find it. I have been looking for a large black rock for substrate and all i have found is something called beach rock and its a dollar a pound. ouch
