I have 3 different test kits, api, Hagen and salefet , I tried using all 3 and the readings were identical, the easiest one for me is the Hagen...I found the hanna checkers the hardest to use, just my 2 cents...
I have 3 different test kits, api, Hagen and salefet , I tried using all 3 and the readings were identical, the easiest one for me is the Hagen...I found the hanna checkers the hardest to use, just my 2 cents...
Just remember if you feed a lot it will affect your test as well. Most people use Red Sea or salifert. Only real difference I know of between the two is Red Sea comes in a plastic box unlike salifert that's just cardboard lol