My point exactley.. there was no reason for me to jump to conclusions and comment on a personal preference, but there was also no reason that I should be called a douche bag..
On a lighter note, I love piranhas.. if you search for serrasalmus brandtii I'm sure my name and pics of my show fish (before I lost him to old age) will show up.. if that's something that would interest you..
But just because you can't put that pond outside doesn't meen you couldn't put it inside, space permitting, and in a controlled environment your heating should cost a fraction of the price.. but I also think with small numbers pygos will lose their impressiveness when not viewed from the side.. from above they look like plain silver fish but from the side you see the intense red in natts, yellow with terns, and orange with piraya... but say 20 would look cool either way IMO..