piranha feeding

I noticed my BP's poop is black. Is this normal? He's on vibra bites, carnivor sinking pellets, and some dither tails (convicts and Danio) when he can catch them.

I get a 1” known serrasalmus species which is said to be collected from Ecuador 4 months ago and have kept feeding it with live feeder fish. It grows to 3“ and recently there were some problems with getting the life feeders. I tried in vain to get it to eat pellets and flakes this week. Is there...

Hello, I'm a video producer who works out of Chicago, IL. My brother in law recommended this site when I had reached out to him to see if he knew anyone with a piranha tank. I'm in an interesting situation where I'm in need of footage for a music video of piranha's feeding - ideally hunting...