What else can I add to my 20 gallon tank?

I have 7 Julie Cories (they love playing in the bubble stream); 3 red wag platies %26amp; 3 marigold swordtails.



I'd like to add one more group of fish like 5 zebra danios or a type of tetra, maybe cardinal.



would that be the max i could add? or can i add even that?
What else can I add to my 20 gallon tank?
I would say just stick with the tetras or 2-3 tiger barbs. In theory you can have as many fish as you want, the only thing that changes is how frequently you you need to do water changes. The fishes waster contains ammonia witch will kill the fish at high levels. When you do a water change you remove the ammonia, not all of it, but it's enough to keep your fish alive. The carbon in your filter also helps to absorb ammonia that's why you have it. Now what I'm getting at is that you can have more fish in your tank, but you have to make sure that all your fish have enough room to swim, and that you do more frequent water changes if you do get more fish.



Here is a great site for you to check out, it covers a lot of commonly asked questions.

http://www.markspetfish.com/



Also if you go to the barbs section you will find some information on the tiger barbs.



Sounds though like you have a nice, and coloful setup :)
Reply:buy some fish that swim at the top of the tank and you'll be just fine.
Reply:Your tank is full, but if you haven't cared about overstocking until now why would you suddenly start caring? You must know this tank is overstocked.
Reply:you could add a max of 5 neon or even tiger barbs, just something small or one big thing
Reply:girl u do u
Reply:You are at the maximum. I would not reccomend buying anymore fish.
Reply:the tank is full, but if you seriously want more fish, try neon tetras.