Fiberglass/Plastic Septic Tank— Plastic septic tanks are largely impervious to the rusting and cracking of steel and concrete septic tanks. Still, they have their own potential problems that should be watched for. Low effluent level can be a sign that a plug at the bottom of the tank has become dislodged. Even if the effluent level is normal All drains in the home converge to a single pipe that leads to the septic tank buried outside. When the waste water from your toilet, shower, sinks and washing machine leave your house, it's combined. When it hits the septic tank, however, it begins to separate. The heaviest particulate matter in the waste, called sludge, sinks to the bottom. If we assume that your septic tank is a minimum of 1000 gallons and that you need to reach 25% concentration of castor oil to have a noticeable odor effect therein, you'd need 250 gallons of castor oil. That's five 440 pound drums or 5 x $750 or about $3750. to buy that quantity at wholesale commercial rates. Septic Tank Maintenance. A septic tank should be pumped out every two to three years. A septage waste transporter (septic tank pumper) that is licensed by the New York State Department of Environmental Conservation can inspect, measure tank layers and pump out the tank when necessary. Maintain Your System. Regularly pump-out your septic tank Many septic additives claim to break down organic waste, and therefore eliminate the need for septic tank pumping. Be skeptical of these claims. Your wastewater is more than just organic waste. It contains minerals, synthetic fibers, plastics, and other solids. No amount of septic tank additives will break down these materials. Step 1. Pour bleach down each drain in the house, as this will destroy any eggs or larvae that may have gotten into the drain. Pour water down the drain to flush away the bleach and flush any larvae or eggs that have been dislodged into the septic tank. You can use an environmentally friendly drain cleaner or check for abnormally high water levels in your septic tank. If the signs are accumulating, you can deduce that the leach field is most likely at fault. High water level in the septic tank. When water is returned to clogged septic fields, the water level in the septic tank tends to rise The Auger Pros went on to say that if you live in an area with a one-way sewer system, you can ask your plumber to install a one-way, non-return valve under your toilet to prevent these unwelcome f0wWdb.