Vals are widely distributed all over the globe. I'm not sure where they originated.
CEC is Cation Exchange Capacity. In short the ability of a substance to absorb surrounding elements and ions to saturation and release them to maintain equilibrium in the surrounding area. (Draw excess nutrients in and release them when the water column is depleted of them). Similar to ion exchange.
__________________
For in much wisdom [is] much grief: and he that increaseth knowledge increaseth sorrow.
Member of the AGA (Aquatic Gardner's Association)
Member of the IBC (International Betta Congress)
|