With acceptable standards for it, usually <10 mg / L. Therefore, for 100% reliability of the test results, you must first test the water from the tap, then from the aquarium, and then compare the readings.
Sidaa darteed, 100% kalsoonida natiijooyinka baaritaanka, waa inaad marka hore tijaabisaa biyaha tuubada, ka dibna aquarium-ka, ka dibna isbarbar dhig akhriska.