Cov tshuaj chlorine uas muaj 90 feem pua TCCA (trichloroisocyanuric acid) nyob rau hauv 3-inch daim ntawv yog feem ntau siv nyob rau hauv lub pas dej ua ke thiab spa tu. TCCA yog cov tshuaj tua kab mob zoo heev thiab yog ib qho zoo algaecide hauv kev daws cov kab mob algae. Feem ntau, tus nqi npaum li cas rau cov ntsiav tshuaj no yog 1 ntsiav tshuaj ib 10, 000 nkas loos dej.
