Most commercially available (and expensive) solvents for sonic cleaners were developed for use on jewelry, dental materials, or greasy bearings; they work poorly on salty scuba gear! Global's solvent, based on a food-grade organic acid, was especially designed to remove the deposits which contaminate dive gear. It's formulated to proper strength, so no diluting or mixing is required. Will not harm cleaner pans. Ships HAZMAT at additional cost. 4 Gallon Pack.