I want to add a couple more fish to my 55 gallon planted tank. I want a smaller shoaling fish, preferably a silverish, black or white color. All my fish are small and grey and I like that it makes the tank look natural. I have in the tank right now, 6 zebra danios, 5 peppered cories and a pearl gourami. I want some ottos, I have some algae and I want maybe 3-4. Would this work and I want something else too. Ideas?