On Wed, Apr 3, 2013 at 8:27 PM, elizabeth bell <whatintheworld1234@gmail.com
> wrote:
> i remember a question about oxygenating water in a hydroponic system.
> imagine washcloth material under water with air coming through the
> fabric.
> the air could be pumped in through a bellows.
>
> i've been reading about saponins (sp?) ..wonder if they have a place in
> hydroponics and water remediation
>
How would they be used in water remediation?
And in hydroponics? I must have missed something.