how many

[dogmandango]

i have a rio 90 and am geting a red belle p of a friend it abot 3inch at mo how easy is it to introduce new ps to the tank once this 1 is in and what is the best food to feed it thanks ps im new on here

 

[master.k.]

To intro a new Piranha to a old shoal move things around the tank , maybe frighten the old Piranha so when you drop new guy in they dont think its food!
(feed before adding) .......... other than that just go for it .