The only thing I know about them is that they use some kind of powder. Can you tell more about it, and how it works. I'd like to do some research before I decide so if you know what brand it is that will help too. Thanks alot.
The powder you are referring to is called diatomaceous earth. It is basically ground up fossilized stone. The powder is very fine and porous so it traps the tiny bits that clouds water.
