Thanks for ID.
Yes, I expected him to grow more in 2 years as well.
Could it be because he grew up in a 60 liter aquarium? He was really tiny when I bought him though and I always planned to move him to bigger aquarium later on. Actually I plan to buy a bigger aquarium in a few months.
Water is clean, I do 50% water changes weekly. I feed him an algae wafer a day as I was told in LFS. Should I feed him more?
Why do you think he's not bigger?