That's if u dose very low dose like 1 drop then u can mix zeostart3 with rodi so u can dose more but less concentrated. I don't know what's your total volume is but I dose 3ml per day and the ghl doser have no problem doing it.for the start3 , i read that i need to use hot rodi to soak the tube before i can use it , is it a must to do that ? i plan to use versa to dose that.