yes, they are great, just make sure you have the room, they do get big! (5-6 inches), one your tank is all nice and clean you will have to start feeding them.
Easiest are the frozen peas as I just tried myself, take some that you are about to use and micro for a min. then peel and trough the insides int he tank, done!
i use to do zucchini, cut a chunk and micro for 1/2 min and done.