1. Scale buildup: Scale buildup nyob rau hauv cov khoom ntim, feem ntau yog calcium carbonate, cov ntaub ntawv nyob rau hauv ib lub pob zeb -zoo li, tawv zoo nkauj. Qhov no yog ib qho qhia tau hais tias lub ntim yuav tsum tau hloov.
2. Tsau: Cov av hnyav thiab qee zaum algae loj hlob ntawm cov khoom ntim ua rau nws nyob thiab siv tsis tau. Qhov no kuj yog ib qho cim tseem ceeb uas yuav tsum tau hloov cov ntim khoom.
3. Natural aging: Thaum lub sij hawm, cov khoom ntim khoom muaj hnub nyoog, ua nkig, thiab yooj yim puas vim dej thiab huab cua yaig. Siab -kub txias ntauwd packing hnub nyoog sai dua li qub pej thuam packing, feem ntau yuav tsum tau hloov txhua txhua 4 mus rau 6 xyoo.
