I really wouldn't recommend using any of these to cycle a 10 gallon, even if they are hardy enough for it. All of them require more room even if you add to the shoals later on after the cycle. Best case scenario is that the fish-in cycle goes according to plan, but you're left with fish that need a bigger aquarium. Any of the rasboras or danios that are suitable for a 10 gallon are going to be nano species and those are all pretty susceptible to chemistry swings and therefore not a good choice for a fish-in cycle.Try a hardy fish for cycling, but keep up with your water changes. Try maybe some danios, rasboras, or if your set on Tetras maybe, try a couple Serpae Tetras or two Columbian Tetras.