Last year was difficult for me to control weeds. I have never had such poor results. Years past have not been an issue so I am trying to cover every factor of why such poor control. I am applying low odor triplet out of my z-spray. 1.5 oz per M. Now last summer was THE hottest on record for my town here in Nothern Michigan. Obviously I had to skip certain days and wait for cooler temps. I think another issue was I let the spray mix sit in the tank for a few days on a couple occasions. So one of the factors I wanted to eliminate was the water I am using. It's my understanding that a high pH combined with high amounts of Ca, Mg, and Na, (hard water) will affect the efficacy of the herbicide. So I had the well tested where I mix. I had these results: pH- 6.8 Concentration of: Ca- 2.0 PPM Mg- 1.6 PPM Na- 165 PPM I was wondering if anyone else has had their water tested and how it compares. I'm not sure who would be a good consultant on this matter. I've only gleaned what I know from some articles written about it by a few universities. Any help would be appreciated. Thank you.