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!!
Bee shrimp (if you mean crystal red or crystal black) are really difficult to keep... unless you want to set up a dedicated tank for them with specific water parameters I'd avoid those. Any kind of neocardinia shrimp like Red Cherry shrimp would be better suited to a community tank, but really the only fish who won't eat those are otos.
go here http://aqadvisor.com/ and enter in the tank size, filter info and fish you want. It will give a general idea if the tan is over stocked or not. From what I have heard, its a bit on the conservative side. Also, it will not tae into account the effects of live plants on the filtration capacity.