Bush Doctor? Sledgehammer? is a unique rinse formula designed to remove excess fertilizer build up. High fertilizer use can compromise plant growth over time due to concentrated mineral salt deposits. Sledgehammer? encourages water movement through soil and soilless mediums, rinsing out unwanted mineral salt residues and relieving nutrient lock up. Use in established gardens, container plantings and hydroponic systems. Bush Doctor? Sledgehammer? is the easiest clearing solution you'll ever use.