HELP - aggression issues

[scottswald]

wow...sounds like I need more Piranha's then...I have 7 @ 2-3in in a 250 gal tank...what do you guys recommend? 4-5 more?

by whats been said you could go for 15 mate..

 

[jp80911]

wow...sounds like I need more Piranha's then...I have 7 @ 2-3in in a 250 gal tank...what do you guys recommend? 4-5 more?

for 250g tank I'd put 15-20 in there, what's the dimension of your tank anyway? as long as the width is wider than 18" you'll be good. make sure your filter can keep up as well
see if you can get some caribes, those are bad ass. Shark Aquarium has them in now. get some while stock last, I think it's like once or twice a year kind of thing.
email G at info@sharkaquarium.com

 

[Otherone]

I'd use the water from the 22 in the 55 - at the very least it will help with temperature and in my case less to dechlorinate.

 

[parker64]

Well usually 3 p's tends to not work out in aquariums try 4 when you bump up to your 55....Good Luck

 

[ballinouttacntrol]

Well usually 3 p's tends to not work out in aquariums try 4 when you bump up to your 55....Good Luck

what's this based on? Larger shoals ALWAYS look better but what facts support that 4 is better then 3 other then the theory that with a large enough tank you can overcrowd it a lil bit to keep aggression down.

3 in a 55 would give them room to each have established territories.