Softened Water-Potassium Salt!
 

Jeff Heimsch wrote:

Does anyone here grow plants in a tank that uses water that has been
processed by a water softener?

One of our club members replaced the Sodium Chloride in his household
water softener with Potassium Chloride, for medical reasons. He says this
also helped his plant tank significantly. Here are some photos:


http://www.svas.info/sam.html