| Several factors that are very important but difficult to calculate from a set formula.
#1 - It is critical to not feed more than your filter system can process without adversely affecting water quality.. Maintaining low levels of DOC's(surface foam), Nitrates, and near saturation levels of dissolved oxygen are a must for koi to reach their potential.
#2 - It is critical that koi not ruin their body shape and get too fat.
#3 - If grown too fast some koi can lose their color and pattern.
Also koi are individuals and will eat, grow, develop, put on fat, etc. differently. Some with be behind and some will be ahead of the rest no matter what you do.
Of your 20 koi pick out the two or three of the best and focus on feeding your pond to maximize their potential. |