Biological products are dedicated for operation and maintenance of a house WWTP, septic or cesspit. A mixture of natural enzymes treat the process in the septics, cesspits, biological filters, sludge digestion tanks and house water treatment units. They accelerate micro-organism activities and decomposition of organic substances. In septic and cesspits operation, they remove the odour and reduce the sludge quantity. Biological products accelerate the aerobic biochemical micro-organism processes of waste water treatment.