- Joined
- Mar 8, 2019
- Messages
- 120
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- 33
Phosphate Hanna with magnetic stir question... Does anyone use an magnetic stir? Tried to, did the sample, then plopped the pill in by hand, removed it with a stainless rod, and it pegged the meter, did it using the shake method, read 0.04....thoughts?? Could it have been my hands handling the pill during the test?? Could the pill contribute to the phosphate reading?? Side question, I have a few boxes of new reagent for the tester, and one old box is expired, should I toss it, or is it still OK? (both tests in this example were new reagent.) not my exact stir, but similar www.bulkreefsupply.com/smart-stir-magnetic-stirrer-for-test-kits-autoaqua.html