Active Tetra

[amcalab]

Of all the tetras, which are active schoolers (chasing each other around the tank) but not aggressive like the serpae and silvertip.

 

[Chri$]

I've heard rummy nose tetras are active shoalers.

From first hand experience i have found black neon tetras to be active shoalers. The larger the group the more active the fish are.

Not a tetra, but Harlequin Rasboras are active shoalers as well

 

[n3ont3tra]

My Black Phantom Tetras are pretty active, and not aggressive at all. They're very pretty.

 

[CBBP]

IME black neons seem to school and move around the tank when they are in a tank with a lower PH (6.4-6.0) with soft water. and in larger number.s mind did not become active or schoolers till i made their numbers equal 12.

 

[Griz]

Of all the tetras, which are active schoolers (chasing each other around the tank) but not aggressive like the serpae and silvertip.

Rummynose or Firehead tetras.
Hemigrammus rhodostomus or Hemigrammus bleheri

 

[groovylime]

I also vote for the rummy noses.