as the title says, it died due to injury. so my parameters are fine. and it wasnt killed off by other fish or nothing. i was just thinking, should i get another rosy barb so that the school has 6 again instead of 5? i read that they need a minimum of 6 in a school. theyve been in my 55gl for about 9 months now, if age is an issue. any insight is appreciated. cheers!