Pretty sure I have the same one. Just make sure it comes with the calibration liquid and you use it before every test. I also second getting the salifert test kitsGet a liquid test kit and follow the instructions. If you’re cycling you really only have to monitor ammonia and nitrates. I’d say every 3-4 days for ammonia and test for nitrates about the same. Once nitrates start registering then your close to the
so i only need to test ammonia and nitrate?