Tank size for Jardini

[Lepomis]

Thanks for all the help lots of good points.

 

[Star-Flog]

I think 6ft x 2ft x 2ft is just right for fish..

 

[willysfish]

I have a 3'' Jardini in a 55 gallon so it can gain some size. I want to know if a 125 will house a Jardini or should I get a 210 to put it in. My 125 is currently set up with different types of Rainbows but I could move them to another tank, if it will house the Jardini, thanks for any help.

P.S. any tips on Jardinis would be great, had a black arowana for 3 years but this guys seem pretty different.

Bigger is better, the fish will grow fast.