Momwe mungagwiritsire ntchito bwino machubu a cod a madzi oyeserera?
Kuyesa kwamankhwala kwa oxygen (cod) kuyezetsa ndi njira yofunika kwambiri yowunikira mtundu wamadzi kuchokera ku madzi osiyanasiyana, kuphatikiza mitsinje, nyanja, ndi kuwononga ...