Rid-X Septic System Treatment Concentrated Powder 9.8 oz. Box Concentrated powder formula helps prevent septic back-up. Contains 100% natural active bacteria and enzymes that effectively digest septic system waste. Breaks down accumulated solid organic waste like grease fat protein starch and paper. Use once per month to help keep septic systems operating smoothly. Safe for all pipes. Application: Drain Cleaner; Applicable Material: Metal; Plastic; PVC; Dirt Types: Food Debris; Grease; Hair; Oil-Based Soils; Organic Matter; Water-Based Soils; Scent: Unscented.