20 g tank and fish

Question
i just started a 20 gallon tank..i have 2 cherry barb 2 white cloud minnows 1 zebra danio 1 pearl danio 2 harlequ 3 black neons and 3 neon teras..could i put more fish in at somepoint or is this enough?

Answer
I would remove the barbs as they are schooling fish (like groups of 6 or more) and get too big for a 20 gallon.  The zebra danio and pearl danio like to swim far and long and need a 4' long aquarium as well as groups of 6 or more.  The white clouds are actually cold water fish and the neons are fine.  I would try to do a couple schools of the smaller neons, or add a gourami or rams instead of the danios, barbs, and minnows.  That is just my opinion...but barbs and danios are not good choices for anything under 40 gallons.