new-system-2. Bottom Da Hoc-concrete. canals. Stone plates. Slits. filled with sand, no function. Plant Area. Canals. Drain pipes to the solar pump. G. r. a. v. i. t. a. t. i. o. n. Stone,Gravel-Filter. Gravitation press the water up. Slits. Bottom Plate. Solar Pump pipe. minimum 70cm. high. 50cm.