I have set up a tank for Malawi cichlids, its a 55 gal and have live plants and everything biologically working.

Now I am wondering if I should change the substrate, I currently have a black crushed granite gravel in there, it looks great, but, it does have some sharpish edges on it. It could be considered quite coarse.

Do malawi cichlids do a lot of digging? Is this substrate suitable or should I rip the stuff out and start again with smoother pebbles.

(I just think the common pebbles are boring to look at)

thanks in advánce, i've never had malawis before.