6/19/2011 2:06 PM
We use a product called wetter water. 11% a.i. and we inject at the rate of about 1gal/ac every couple of weeks. Any higher than that and we have foam appearing around heads, especially tree bubblers. It equates to about 500 gallons every couple of months. We don't use it year 'round, but I make sure it's in the tank for when I do need it. I haven't seen any negative effects, other than the foam.