Over my career in water ...
Published by Terry Scheurman, President at Applied Specialties, Inc.
Over my career in water treatment, many of these no chemical approaches have come and gone. Every time I have been asked about a new one; my response is the same. "Have the vendor supply a pay if it works trial of 180 days." They need to write the objectives and what will be achieved and the benchmarks of success. There must be at least 2 measurable KPI's. If someone claims they have an answer, let them prove it without you footing 100% of the risk for their bold claims.