M'malo athu enieni oyesera, pali zizindikiro zambiri zomwe ziyenera kuyesedwa, Residual chlorine ndi chimodzi mwa zizindikiro zomwe nthawi zambiri zimafunika kudziwa.Posachedwa, tidalandira ndemanga kuchokera kwa ogwiritsa ntchito: Mukamagwiritsa ntchito njira ya DPD kuyeza chlorine yotsalira, zimamveka fungo lolemera, koma mayeso ...
Werengani zambiri