Hanna test kits

I've used the Phosphate, phosphorus, Alk and salinity kits so far. I just picked up the calcium, temp/ph and TDS as well. The ones I've used have been pretty accurate and easy to use. I can't stress enough to follow their instructions to a tee. The stated accuracy depends on it for some of the tests.
 
Love these. And if you ever want to validate the accuracy, for $20 you can have calibration fluid vials to show it’s working correctly.
 
Thank you everyone. I hate watching the colors. It's always a pain for me. I will purchase the alk and calcium ones tuesday
 

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