Whink liquid Septic Treatment contains billions of septic cleaning microbes and enzymes that digest more organic waste, paper and fats faster! Biodegradable. Safe for pets and plumbing Digests solids - paper, grease.. even hair! Reduces the need for costly pump outs FOR BEST RESULTS Don't be fooled by claims that 4 treatments a year or less are sufficient. Monthly treatment is essential to prevent problems by restoring the microbes destroyed by detergents, cleaners and bleach.