Originally Posted by Bubba Shrimp
The min is 10 gallonI read, I only got three because there's 3 Amano shrimp and 2 Ghost shrimp in there to. They are still small about one inch long (males). They play lots very active tetra.
Did you read the profile of this species on this site, as another member suggested? Click the shaded name, Colombian Tetra to pop-up the profile.
In the profile it recommends nothing less than a 3-foot tank for a group of this fish (alone). If you only have a 10g, you should return the fish as they will cause trouble and be stressed and likely develop other issues.