You managed to keep six adult red belly piranhas with Chinese algae eaters and jewel cichlids? You must be the fish whisperer or something because that won't work 99% of the time. More like 99.9% of the time. The piranha simply interpret those fish as food.I never had a problem keeping my group with other fish. Mainly with Chinese algae eaters and jewel cichlids. Kept probably five CAE and ten jewels along with six rbp in a 6x2x2 when the rbp were probably 9”.
My previous attempt ended with the convict cichlids I was trying, killing my five 4” rbp.
AND you had convict cichlids which killed five medium sized red belly piranha? Were you adding steroids to their food or what? ?
Crazy stuff going on in your tanks. Please take video next time stuff like this happens because I'd love to see.