I'm into day three, I noticed less fragments floating around during feeding. I'd also like to believe that the reason one of my fish is currently fading is the food, but I seriously doubt it(3 days ...., lol).
The only thing I can say that might be considers a negative to some is that certain pellets sink to the bottom faster than my fish can eat them. This could lead to a problem long term, as they don't always find all of the pellets. Background: my fish have never eaten any pellets besides the floating types.