Review on Hikari 17 6 Ounce Sinking Pellets Medium by Gary Konduru

I was pleased to find that sinking pellets are much better for goldfish and koi. I didn't realize that when a fish is feeding on the surface it can gulp air which can affect it in a number of ways. My fish are 5 to 7 years old maybe with a baby. It took them less than a day to test the pellets on the ground. They eat well and look beautiful. I've had fish in the past that couldn't swim vertically and eventually died. I wonder if it was from swallowing air? If so, sinking pellets should solve this problem. All my fish are beautiful in color and appear to be very healthy. and I should have said in the first place that hikari is my favorite of all fish products.