Currently in my 20 gallon I have 6 tiger barbs, 5 zebra danios, 3 otos and a 4 inch dojo. Everything is kind of the same color. Are there any fish that are blueish or whiteish that I could still add? I use a Penguin 170 for filtration and also have some water sprite and java moss in the tank. I was thinking maybe a paradise fish or some pearl danios. Would a paradise fish get along with the tiger barbs?