I actually do have an autofeeder but I don't use it at all. It takes the fun out of koi keeping! To me the best part of koi keeping is feed time. Auto feeding takes that personal touch away.
My filter is reasonable sized (pond tonnage 100 tonnes includes the 20 tonnes filter) and I have a bakki shower too. Yes, the fish individually develop at different paces. Some outperform whilst others underperform. The issue at hand, I guess, is whether by following Oomo's feed rate, the outperforming fish will do even better and the underperforming fish will no longer underperform.
