I-tank eshukumisayo yokucabanga ukuthi impahla iyanyakaziswa, ixutshwa, iyaxutshwa, i-homogenization, njll., ithangi lokuxuba insimbi engagqwali ngokuya ngezidingo zesakhiwo sokuklama inqubo yokukhiqiza nokucushwa kungenziwa kufane futhi kwenziwe kube ngabantu. Ukuxuba ithangi enqubweni yokuxuba kungenziwa ekulawuleni okuphakelayo, ekulawuleni ukukhishwa, ukulawula ukuxuba nokunye ukulawula okuzenzakalelayo okuzenzakalelayo. Ithangi elishukumisayo lingabizwa nangokuthi ithangi lesigaba se-aqueous.