Kribs and most all cichlids are extremely aggresive
you cannot keep glass cats with them most likely
some people have kept small cichlids for a while in community tanks, I myself.
but I learned that once they build their nest, they become extremely territorial and attack everything.
so make a community tank or a cichlid tank, it is never a good idea to mix.
if you still want to keep them, they like sand, small rocks they can dig in and an empty decoration or log they can hide in as a house. sometimes they dig under objects too.