Well i use the fork technique too but i always feel like my glass is gonna get scratched, my panaque attacks the veggie +forks and bumps it into the glass quite much. Never seen a scratch from it though, but I sometimes feel it's a disaster waiting to happen
Cute pictures! I don't think you need the fork, though, for your big guys. You might try just throwing in large hunks of food in the tank for your pacu. They have really good mouth action, and do really well without utensils! Meal times can be quite entertaining!
Pacus munching on veggies!! Nice pictures!! If your pacus grow any larger you can throw entire Zucchini, head of Lettuce, or Watermelon. With or without a fork is optional.