This is my personal opinion. If you use this for aquariums. To calibrate the device, you must have a clean, unused RODI seawater solution on hand. So if you want to have a quick look, it's not that convenient. To a lesser extent, perform water changes and prepare new water. Then when you do a water change, you need to wait for the water to fully mix and settle. So it's not a quick check. Now you can mix solutions, but again it takes some time to transfer everything. So I would call us a test kit. if you read clear to very light pink. Don't worry, just change the water. Test suites are easy and fast. If you don't mind playing a mad scientist and you have plenty of time, then this is a fun set.
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