That’s what you’re supposed to due lol. You can’t fault a test when you don’t follow the directions lol. I’ve been keeping fish for over 10 years and I use api testing for most things 90% of the time. I also own 2 other full testing kits and I’ve never once had any variation in testing results between any of them.Yea i know but im saying dont hold it up against the card it drasticly changes the color
If you want to get detailed then Hanna po4, and get a digital salinity, ph and temperatures meter all in one. Outside that it’s all the same only different is how much time it takes to do the test and the cost of the test.
As far as time is concerned... Api beat the **** out of everyone else.. that’s why mid level people crap on api and expert reefers use api for several things still.