Good rotenone stewardship results from the prudent use of the product by taking responsibility of reducing environmental impacts.  Consistent with this, in flowing systems treated water must be deactivated with potassium permanganate (KMnO₄).  Deactivation may be achieved by the addition of KMnO₄ in liquid or solid form.  Most liquid applications use a reservoir with a metering device to dispense at a constant measurable rate.  In many cases, it is preferable to apply solid KMnO₄ using a metering feeder.

One supplier for equipment for the application of solid KMnO4 applicators:

Acrison® Auger Metering Mechanisms, Sales Department can be contacted at 201-440-8300 or informail@acrison.com

https://acrison.com/acrison/product-lines/volumetric-feeders/dissimilar-speed-double-concentric-auger-metering-mechanism-models-105-140-series/