I think the key thing is to rinse the shrimp really well before you feed your aros.
I always run warm water over them in a small cup, then cut the shrimp up and rinse it 5 times. You'll see lots of bubbles and oil every time you rinse it. I used to have a film of oil on the top of my water when I fed shrimp, but since I started rinsing them like that, I never had that problem again.
I always run warm water over them in a small cup, then cut the shrimp up and rinse it 5 times. You'll see lots of bubbles and oil every time you rinse it. I used to have a film of oil on the top of my water when I fed shrimp, but since I started rinsing them like that, I never had that problem again.