When our pond fish were experiencing health issues, we were recommended to give our fish a medicated food called Medi-Koi. This is used for bacterial and fungal diseases. This food sinks to the bottom where sick fish typically reside. We did see the sick fish eating this food and did notice a slow improvement in their health.

Pros: recommended by Koi expert

Cons: pricey

I don't forget to feed our pond fish but for some reason I'm not too great with remembering to medicate so this works.

Pros: Good for medical shy people

Cons: None

This is a easy thing to use no need for three different things. Its simple for a busy lifestyle.

Pros: great

Cons: none

Great food to feed...eliminates the worry of parasites in your tank.

Pros: Healthy

Cons: none