We clean our waste water from the kitchen with a fett abosrber. With the old grease we produce our own detergent. Then the water after leaving thee septic tank getting filtered from the soil and with this we give nutrition to our soil. The resst going then in the pond in front of our house. There we plant Azzolla, Water spinach and other plants. They take out all the rest of the nutrition. The PH at our pools are around 7. Perfect! And we produce a lot of nutrition out of it. Because we don’t use chemicals, also in the water cannot be dangerous chemicals, Therefore we can eat everything, what is growing there. We don’t have to test this, because we now, what we giv to our wastewater.