Welcome to AC Mike! This thread is 20 years old...but I like your tank pic! I have to say, like many people, I had problems trying to keep cardinals or neons w/ adult tiger barbs. I bet all your plants help keep any aggression down a bit.
Tell us more please! I think it's a 20g standard tank (neither long or high)? How long have you had it set up this way? I'm a plant person & yours look healthy & nice. What lighting are you using? What other fish are in there? We'd like to know!
You might start a new thread for your tank. There's a "new topic" bar or button on the upper right in a given forum (like this "General" 1). There's also an "introduce yourself" forum way, way down past most everything if that feels more comfortable. You could tell us how long you've been in the hobby, favorite fish (mine are loaches & catfish) or, in a vague way, where you live. We live all over, mostly in the US, but everywhere! We might help with clubs or shops to check out too.