I tested the conductivity of one ball of 1 gram in RO water, conductivity rised from 7 ppm to 100ppm when "mixed" completly. On the manure package they say that there is Chicken,Cow,Horse manure, green compost, marine algae. they said there is 1% nitrogen, 0.9 phosphate 1% Potassium, Carbon/nitrogen ratio is 11.
In the glass, the balls actually disintegrate, if i'm right, organic matter have really high CEC ? The ball stay long enough hard to the water to put them in the bottom which is perfect. How that organic matter will behave under clay substrate ? will it rot ? the conductivity in the aquarium is still the same so maybe flow is not fast in the substrate.
The clay i mixed with the manure/compost/algae organic is Green French Clay, which is Illite, Kaolinite, Mont... the last one is supposed to have really high CEC. The clay is actually called "Clay of velay" which is supposed to be unique because there is no qwartz in it. They claim that CEC of that clay is high, but maybe it's nothing to worry about because of the high cec of the organic matter ? thx