HikariUsa Inc AHK06370 Wheat Germ 4.4lb, Medium

Q: is this food appropriate for spring time as the temperature begins to rise or just for the fall?

wheat germ based food is best for cooler seasonal temperatures where the pond water is hovering around 50 degrees. below 50 degrees ( ish). I have never feed my koi with water temperatures below 50. Their cold blooded metabolism will not allow food to digest in their near dormant state, and if they eat in that state ( which ..well they are koi they will eat) it rots in their gut ...serious problem . I use wheat germ in early spring and late fall/

Q: Could someone tell me how big the pellets are in mm? I'm looking for larger pellets.

According to a chart i found on the manufacturers website, the Hikari Floating Wheat Germ Pellet Medium is 5.0 to 5.5 MM. It doesn't seem that large to me. If you are looking for a "large" pellet, it would stand to reason you don't want to buy a "Medium" pellet. Sincerely,Nate at Practical Garden Ponds