I have a queation in using Tetratest NO3
我有一個使用Tetra測試劑NO3的問題
I followed the tips to finish the measurement .It seemed to be over 100 mg/l. But I shaked it well again for
我遵照指示完成測量. 測量看起來像超過100mg/l. 但是我再次側底的搖晃測試劑大約
one or two minutes. THe color changed to be close to the scale of 12.5 mg/l...