Siv cov kua mis tshiab tshaj plaws, tus nqi pH ntawm lub tsheb ntxuav cov kua yog nruab nrab, zam kev ceev ceev ntawm cov alkaline tsheb ntxuav cov kua ntawm cov xim pleev xim, thiab ua kom cov laus ntawm cov xim pleev xim, cov log tsheb thiab lwm yam.Qhov siab tshaj plaws ntawm lub tsheb ntxuav ntawm lub khw