I use the PH and Ammonia Alarm Combo Pack in my 2 gallon quarantine tank and it was just right for me, I know this because I use it in combination with use API masterkit. I used them years ago and the price was right so I ordered them for peace of mind and for my lazy days. It's a lot easier than taking water and testing these things one at a time, waiting minutes waiting for test results from liquid tests and trying to figure out which color is which when one color looks almost identical to another. An extra PH circuit test was included in the package so you can replace the PH circuit if you run out of the one already installed. Please also read the instructions for optimal, safe and thorough results. It's not instant, it takes a few minutes as conditions in the water change, also don't touch the circle in the center because you might ruin it with oil on your fingers. If you use it but want to keep it, you can do so by following the instructions again. I love mine, it gives me peace of mind for what it's worth in and of itself. I've had pH color changes multiple times as if I'm even doing water changes and after using Indian Almond Leaf this should happen because IAL lowers the pH after it's been in my tank a few days later and also when I'm doing water changes , because the water is in the tank was emptied with shrimp gravel and IAL, which turns it off, which also proves to me that it worked. It may also take a few days to work properly if the 1st is installed according to the instructions.
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