So I just stocked my tank with about 30 juvi mbuna all about 1.5" to 2" long. Along with my order I ordered 4 synodontis lace catfish also 1.5 to 2" long. However, the order came in and only has 2 cats, and they are approximately 5" long. Would it be safe to put them in there or will they pick at my mbuna?