I have 3 red belly pacus and I love them they are my babies. The Big one which is about 17" I call Bubbles cuz she likes to play in the bubbles !!!
They are housed in a 240 gal with a pleco and a bumble chicild.
i got Bubbles when we purchased a 55 gal tank from a teenager, he had the pacu, an oscar about 10" , the bumble bee and a couple of other fish in a 55 gal, once i seen the pacu, I told my husband this was a rescue mission. Had to save her. Saved her life 2 times already, she floated belly up when we brought her home, the she got real sick when we got her a bigger tank, eyes with film on them, fin rot, did not eat for 1 month. Boy I was scared to move her when got 240 gal. But she did rally well that time.