I was hesitant to buy because the reviews were very positive or not but the convenience of when it actually worked was too tempting. Both were installed in my healthy 40b tank over a month ago. I've confirmed with the API test kit and while the ammonia tests don't look for the same type of ammonia, I haven't found any positive results for either Seachem's or Alert's main test kit. API's pH values are very close, if not quite, to what I interpret as color on Seachem. Very happy with it, I can only recommend it.
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