I have both an API master and reef master kit and a tetra "master" test kit. Both are liquid test kits and both are new and nowhere near expired.
Here is my dilema...
With the tetra test I am showing a PH of 7.7 with a hardness of 6.!
With the API tests I am showing a PH in the 8.3 range with a hardness of 8 and calcium at 420.
I went to two separate LFS to verify my testing. One uses API and had similar results than mine with the only difference of PH being slightly lower than 8.3 (He said it was between 8.2 and 8.3). The second LFS uses the tetra kit and their readings matched the tetra test results I had. They used API for calcium and came up at 360! (same water sample taken within 20 minutes of each other).
Which tests would you believe? Which of the two products would you trust more?
Here is my dilema...
With the tetra test I am showing a PH of 7.7 with a hardness of 6.!
With the API tests I am showing a PH in the 8.3 range with a hardness of 8 and calcium at 420.
I went to two separate LFS to verify my testing. One uses API and had similar results than mine with the only difference of PH being slightly lower than 8.3 (He said it was between 8.2 and 8.3). The second LFS uses the tetra kit and their readings matched the tetra test results I had. They used API for calcium and came up at 360! (same water sample taken within 20 minutes of each other).
Which tests would you believe? Which of the two products would you trust more?