Originally Posted By: Justified
Originally Posted By: John F
I don't know what it is about my ponds, but you can stir up the nearly pure clay bottoms and it settles in a few hours. Never used alum. Any explanations?


I'm not sure either, but sounds awesome. smile


Easy explanation is your clay is not "colloidal"...(extremely fine and microscopic particles, all negatively charged). Most clay does not separate into microscopic sizes, and/or those non-colloidal clays are often attached to other, positively charged molecules that create tight bonds.