Hi everyone, I have an albino arowana he's 18+ inches long and I recently started feeding him bsfl (black soldier fly larva) also called phoenix worms/calci worms. He enjoys it and he's not a picky eater but I noticed he's pooping the worms he's eating or his poop is the larvae itself but darker in color. Is this normal or is he having a problem digesting the larvae and needs more getting used to? I will attach a pic for better understanding. 
