Hi. I have a 20 gallon long, moderately planted. I did a fish less cycle and added 6 glowlight tetras. I am absolutely terrible at making decisions, so I need suggestions on what to add. I really like silvertip tetras, cories, otos, sparkling gouramis, bee shrimp, and snails. I would like to have 6 glowlights, 6 silvertips, and maybe 4 cories, but I'm pretty sure that's overstocked. Any stocking suggestions would be highly appreciated. Thanks!!