Mine say's 1 drop = 1dKH when you have 2.5ml of water in the vial, or 1 drop = 0.5 dKH when you have 5ML in the vial, did you double check that? Their instructions seem pretty vague at best compared to others, but the test results i get from my Ca, Mg and dKH seem to be pretty accurate from test to test (i was double and triple testing in the beginning to make sure my results were correct). The kits do seem to be very expensive though imo.
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Fluval Osaka 41g sumpless tank, 250w MH + 130W PC , DIY HOB refugium, Tunze 9002, Koralia 2, Koralia Nano
Toad Stool
Colt Coral
Purple Shrooms
Red Shrooms
Candy Cane Coral
Hammer Coral
Moon Coral
Copper Banded Shrimp..and growing
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