Thanks I'll watch out for that.

The bottle suggests 10ml per gallon. As with the rest of my nutes I'm at about 55%-60% strength. I buy a few gallons of distilled water a week and change the nutes out every Saturday. Flush the system with Clearex and add fresh nutes. I start by mixing three full strength gallons. For each gallon: 10ml of Micro, 15ml or Grow, 5 ml bloom, 10ml Cal-Mg, 10ml Liquid Karma & 10ml Hygrozyme. I add the three gallons of full strength to the rez then add distilled water to dilute the mixture. Adjust PH then run system until the the run off and res are both the same PH and PPM.

It's been about 2 days since I added the Liquid Karma and Hygrozyme. I haven't observed any problems so I hope it wasn't too much. I'll keep an eye on it.