Hikari® Spirulina is a supplemental finishing diet for feeding higher quality koi prior to a show or when water temperatures are higher. This exceptional formula rapidly promotes rich, natural coloration as a result of the ideally blended color enhancing ingredients. Hikari®, successfully making champions for decades™! Feeding : Carefully feed the amount your fish will completely consume within a few minutes, based on your water temperature, pond condition and the activity level of your fish.