Thanks. I'm definatley not in a hurry to get this tank set up. I want to make sure that the water is at top notch and all is settled down before I introduce anything fish wise. What about the live rock though. How early can I introduce that to the tank?+1
but if you are in a hurry to get everything up to (general) par then get the hydrometer and return it once you get the refractometer.
there is no limit on how often or how much these can be used
refractometers are way more accurate and use less water