Pesticide carryover can have devastating effects on your grass, plants and crops. This water-soluble spray tank cleaner eliminates that worry. It's so effective it even works on diesel/herbicide mixes. Gemplers Spray Tank Cleaner also counteracts the harmful effects of minerals found in hard water -- minerals that can clog the spray system and lead to corrosion. A little goes a long way. This 1 gal jug will make up to 400 gal of cleaning solution.