pH and water level control system to maintain the growth of chili plants in aquaponics.

The cultivation of chili plants with an aquaponic system is one way to increase the yield of chili harvests, which are quite promising in Indonesia. However, in practice, this method is strongly influenced by the actions of farmers in maintaining pH and water levels manually. In this study, a system of controlling pH and water levels in aquaponics has been made in order to minimize the occurrence of human error in the growth process of chili plants. The method used is the on-off control of water pumps based on the inputs of pH and ultrasonic sensors commonly sold in the market. The accuracy of the two sensors reaches 97% with a reading error below 4%. The control system designed has a slow response with a ph control settling time is 420 seconds and water level control is 129 seconds. As well as a pH control rise time with a time of 292 seconds and a water level control rise time of 30 seconds. [ABSTRACT FROM AUTHOR]