api test

Hi guys, I’m looking for a reliable chemical water testing master kit for the tropical tank. Firstly, NTLABS or API?? As I’m in the U.K. I imagine the options are limited… Secondly, can I use the same kit to test my pond water and cold water tank, too? This might be a silly question but I...

Hi :) I just recently got a betta fish and I had been using the test strips to test the water because that was all I could afford but I just bought the API master tester kit and nitrate and nitrite came out perfect but the ammonia water was clear? The only options are yellow to green so does...