I was wondering if there was a piranha reference site that shows a time line of growth from fry to adult. I would like to know where mine are at and the average time line of their growth.
they are right. there is no timeline like the one you are asking about bc ppl get different results with tank size, filtration, water changes and diet. they are a boney fish so they will always keep growing. if you get them to 6-7 in in the first year you are doing a good job. they grown the fastest when they are smaller. you can expent about 1-1.5 in a year after that.