I know that you should not mix the bio-enhanced dethatcher with chlorinated water because it will kill off the micro-organisms that make the breakdown of thatch possible. When I mix the dethatcher with what I know to be chlorinated water I add an aquarium or pond de-chlorinater to the water before I add the dethatcher to my tank.
Tonight while giving an estimate, the homeowner asked how his sprinkler system would affect the dethatcher being it used city water that was chlorinated? I couldn't answer his question with any certainty so I told him I would check it out. This is something I had never thought about!
Anybody have an answer?