On 24 December, 1988, His Majesty graciously granted another initiative to treat polluted water by adding air which can be done by two methods as follows:
One method is to compress air into the main pipe and expel it through diffuser tubes. The other method is to use a waterwheel to lift the water and return it. This waterwheel rotates slowly by using a small electric motor, not exceeding 2 horsepower, or using power from waterflow. It was considered beneficial to construct models of the aerator and experiment with them at Phra Mongkutklao Hospital and Bavornives Vihara Temple.