How many Ottos

[Tazman12]

How many ottos should I have in a 30 Gallon tank to help keep it
clean.

thanks

 

[snowrat2004]

i have six of them in my 29 gal and they do a good job of keeping it clean.

 

[fish_r_great]

start out with a few and then get more if you need

 

[Sinuhe]

They prefer to be in groups, so I'd start with at least 3 or 4 .

 

[aernympha]

3 or 4 will be best!