Astuti DKW, Jaya AR, Nindito DA. TDS and pH Produced by Bee Nest Water Purifiers Due to Differences in the Thickness and Density of Coconut Fiber Filter Media . jts [Internet]. 2025Oct.1 [cited 2025Dec.6];21(2):319–333. Available from: http://114.7.153.31/index.php/jts/article/view/9692