Hi everyone I have a big problem... I have two 55 Gals the 1st one I have tiger barbs, silver dollars, zebra Danios, Gouramis, Kuhli loaches, tetras and it works fine as they all Get along. But in my 2nd 55 Gal I have 4 tiger Barbs, a RT shark, 4 Gouramis, pleco, Buenos aires, Emerald cats...