What is the smallest Tetra.?

[oldskool]

Hi I want to have a highly planted 3ft tank 180litres below my existing tank and would like to house as many tetras as possible in this tank so I can watch them school - does anyone know the smallest type of tetra as the more i can house the merrier -
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thanking you in advance

 

[One_Trick_Pony]

there not the smallest but penguin tetras form a really tight schoal

 

[Lateral Line]

Schooling/shoaling is a defensive behaviour adopted by small fish when they feel threatened. In small tanks it is rarely well seen. Put 10 neons in a crowded 2 foot tank and they'll go their own way. Put the same 10 fish in a 6 foot tank with a lot of open water and they'll stick together like glue.

The point I'm making is that rather then sticking a whole load of fish in your tank, a small group may be better for you.

It is also true that heavily planted tanks are often very lightly stocked. Plants require CO2 to grow, indeed, most planted tank keepers add CO2. With high stock levels, a high filtration rate and surface agitation is necessary to keep the stock alive - this same action drives CO2 out of the water and starves the plants.

 

[The-Wolf]

does anyone know the smallest type of tetra

here is a list of most tetras, you do your own searching for the smallest

http/www.fishbase.org/ComNames/CommonNameSearchList.cfm

I personally think that ember tetras are the smallest @2cm but I could be wrong.