Floating may be more natural for the koi, but it is more fun to watch them cruise around the surface to eat. Doesn't sinking food also present a problem with food getting sucked into the bottom drain? Do you turn the air on the bottom drain off? With TPRs going, bottom drain sucking, and aeration going, I think the food would get sucked in quite quickly.
I bought a type of food that is suppose to be floating, but most of it acts like slow sinkers. Within a couple minute half has sunken. Also, non of my fish seem particularly interested in it for some reason.
- Wayne, thinks his koi's favorite sinking food is shrimp! But gotta turn the air off because it's too wasteful to let the bottom drain eat it.
