Zebra Danio Tank Size ?

[singlecutguitar]

I want to know how many gallon (or liter) needed to keep around 20 Zebra Danios ?

 

[fluttermoth]

Gallons or litres aren't so important for these fish as length; they are very active and need plenty of room to swim up and down to be happy.
 
You want a tank that is at least 3 feet, or 100cms.

 

[Chad]

Standard tank about that size is a 29 gallon tank or a 20 gallon long.

 

[the_lock_man]

I would say the same as Fluttermoth - length is the key. I'd be inclined to say 4 feet, but appreciate that they will be OK in a 3 feet tank.