32oz Mad Farmer Detox Cleaning Flushing Solution Clear Salt Build Up 1 Quart Hydroponics: Use 5ml (1tsp) per gallon of pure water and run system for 1-2 hours. Soil/Coco: Use 5ml (1tsp) per gallon of pure water & drench until solution drains out of the bottom of container. Pre-Harvest/Final Flush: Use 5-10ml (1-2tsp) per gallon of pure water and use for 7-10 days before harvest.