salinity is the most important and easiest parameter to maintain in this hobby. It dictates the starting point of all the elements in your tank. I use a Sybon refractometer and calibrate before I test any new salt water or the water in my tank. Doesn't take that much time but the results can be disastrous if you've got more sensitive corals and are using a unit that isn't calibrated properly
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Illuminata 57gallon rimless <-- this is a lie!
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