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Mike,
I'm glad you wrote that down for others to be exposed to. it will definetly help them better understand.
Among breeders certain koi seem to do better in areas with a sand based
soil rather than clay and vice versa. Silicon is present with sand and one of the breeders of my favorite koi, Hosokai often says he breeds asagi's
dispite the fact they don't do as well in his clay based soil!
In my seminars, I'm ofter quoted by my students in a joking manner
"cleanliness is next to godliness and next to running a better koi pond".
with your summation of what you learned about black, they and others will be able to see why I preach that gospel!
There are different products for sale for koi keepers. one of them is "sumi power"...Gosh you don't think it has any silicon in it do you?( makes you want to go out and put in a sand filter) but seriously know that one traps so much and so efficiently that it's almost impossible to keep clean and begins to work against you! Ahhhh, the joy of koi!
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