All I can say Showa86 is that some of the best Koi Growth rates that I have seen of are always in ponds with the most expensive filtration systems, people who feed quite often everyday and/or people who use large anoxic filtration systems.

All I can say Showa86, is that some of he best Koi growth rates that I have seen of, are always in ponds with the most expensive filtration systems, people who feed quite often everyday and/or people who use large Anoxic Filtration Systems.

Of course this does not mean that I've not seen very good growth rate in very large 1 acre ponds that are carefully stocked with Koi and have excellent growth rates because of added feeding besides whats in the pond already. However, for people with backyard ponds this  means investing thousands of dollars into their expensive  equipment and then feeding some very expensive Koi foods. Whether it's the anoxic filtration itself, or the combination of clays that are used in the filtration system itself, this seems to trigger a better growth rate than most people experience with using some of the more high-tech equipment.This means the bigger the pond the more outlay for that equipment.

This year one of the top five Midwest Pond and Koi Society members "growers and showers" will have their pond open for the first time on pond tour. My avatar shows a picture of their pond, they just happen to be from the UK and they just happened to also used the anoxic filtration system exclusively.

I'm not saying that the anoxic filtration system is magic, that would be nonsense but what I am saying is there must be a reason and/or correlation because of this system, that growth rates are tied in with the system and people are saving thousands upon thousands of dollars in filtration systems.

We do not fully understand why some filtration systems and different foods react differently with Koi growth rates, but that seems to be the case. Is it a combination of the two... I would have to say no, it's either one is very good or the other is very good but it never seems to be that people hit on both of them exactly and will come up with a growth rates for Koi that are a good end result that everyone could agree upon that is the right answer. I've seen people use expensive foods and have poor growth rates or expensive filtration systems and still have poor growth rates.

I only say this because people still never get as good of growth rates as they do in grow-out pounds. Grow-out ponds usually have no filtration systems at all, what they have is An unlimited food source and mass of water, compared to our backyard ponds.