Currently the tank is being cycled I want to get some fish on my birthday on July 9. It has been cycling over 4 weeks so far and everything is going good. It has a 10-30 gallon tetra internal filter, with an undergravel filter, a heater that keeps the water around 78-79 F, and some water and other orniments from my dads tank that has been set up for years. Also it is a standard size 20 gallon because I know some people will ask what style it is. I want the fish tank to be tropical. I would pefer no guppies or bettas. What I am asking you for is to come up with the best fish list that would be compatible for the tank. Thanks for the help.