Not sure if they are accurate. I have brand new pH and Ammonia alerts from Seachem saying my pH is around 7.6 and my ammonia is in the safe range. When I used these test strips, they said my pH was very acidic. He also said my nitrites and nitrates were too high so I did a water change about an hour after retesting and the level was still high so I added a nitrate/nitrite remover chemical and another hour later retested and that was it, still high. Normally my aquarium has a very even keel and I don't have any fluctuations in the water parameters. I bought another brand water test kit and all my readings are different from these test strips.
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