I have a 55 gallon tank. I have had it for years. I have not added any fish for 3 years as I have decided to switch to cichlids. I now have 1 clown loach(bottom feeder) and 2 hatchet fish( stay right at the top of the tank)left. I am getting impatient as my tank appears so empty. Could I safely add a few cichlids with these fish? I assume the loach might be fine but I don't want the cichlids to harass or kill the hatchet fish. What do you guys think?