Yeah, that is over 1500 and I don’t know of any salt mix that runs that high. You might want to find a you tube video on the test to see if you are doing it right. You could take it in for testing at a LFS. My magnesium runs the same value as my salt mix.
Welocme to our house. Please feel free to look around and stay for a long time.
Only suggest I have is did you do a second test to see if they match ? Good info on testing by watching u tube as mentioned. How long the tank been up, Are you dos8ng anything yet? More info you can give the more we dcan drill down to the answer