My Pinktail is 10+, I have had it for about 5 years now (maybe 6 I will have to look back), it was 4-5 inches when I got. Eats 2-3 times per day a variety of vitamin soaked meaty foods along with greens.
This trigger survived a lion sting about 3 years ago. In the past I kept it with clowns and chromis, But this past year has been rocky with my trigger. I watched him kill a 5 inch bluethroat in seconds because the bluethroat tail slapped at him, and I suspect him in two lion (volitan) deaths.
He was in a 8' 300g tank and since the deaths has been moved to a 6' 130g sump, yet I would not trade him for anything.
Kaye