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- Jan 14, 2018
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I have no idea if his Hanna is broken but I would certainly like to see a minimum of two tests done with a big difference in the standards concentration. I would prefer a test at 0.05ppm and another at 0.25ppmFor the OP, which Hanna checker are you using, the LR, or the ULR?
Also, I don’t understand why people are so sure that your checker is bad based off of your information. If you are using lanthium to remove PO4, the directions clearly state that you may get a higher reading on a test kit than what is really in the tank. You got a higher number than the ICP test showed. That’s not unexpected since the lanthium messes with the chemicals in home test kits.
Check your tester with the Hanna standard testing solution, and if it test within the excepted tolerance, you are fine. Just know that you probably have to give it a couple of days for filter socks and your skimmer to remove the lanthium before you test. I would trust the ICP.
We have absolutely no way to test the ICP but I would also lean towards trusting it. Another member suggested the ICP test vials could be adsorbing the PO4 quite strongly.
If the two tests against known standards prove to be within margin of error then we have our answer that the unit is fully functional but results from his tank may be skewed due to the lanthanum chloride.