how many?

[Onion01]

geez, what is it with you piranha guys? p's not aggressive enough, so you have to make up for it on the forum? Answer the question, and leave the trolling out of it...

 

[andres]

I may be pushing it, but i would put 8..
I over filter and w/c frequently though.

 

[jah29]

my friend has 5 or 6 in a 120g and they do just fine

 

[BooshWacka]

currently have 4 6-10in in a 110 gallon no fights yet

 

[Muske]

I had 4 6-7" in a 55 for 2 years. They were a little tattered, but otherwise in very good health. I would assume 7 - 8 in a 135 would be good. As stated above, many WC's and over filter.