I have a 30 gallon with two Goldfish, a common and a fantail. I want to do tropical, so I'm going to put my common in a local pond and give my fantail away on Craig's List. I want something unique and cool, like Silver Hatchetfish, a few Kuhli Loaches, and some other cool looking fish.
Hmm, you could go something like
14x Silver Hatchets
14x Cardinal Tetras or other kind of tetra.
8-10x Kuhli Loaches
A pair of gouramis? Maybe some Platies? Swordtails? Or a school of 12x Praecox Rainbows?
For algae control, you could get an unlimited amount of cherry shrimp and amano shrimp
I have two Kuhli Loaches and I love them. They love to hide a lot. From what I've heard one should have more than two loaches as they love companionship.
+1
if you want them to be very active, give them a lot of hiding places. Ironically, the more places they have to hide, the more they are out.