The ones I had before grew pretty fast. They will still stay to small to live with your Pbass. If you give plenty of cover though they will give your Pbass a run for their money when they try and catch them. Giant danios are pretty fast fish and are always on the move.
I had one in a tank with some preditory cichlids and there was one that they could not catch no matter how hard they would try. I eventually had to take it out cause they would focus on it so much that they wouldn't even pay attention to other food I put in the tank.