refractometer

[jvene1]

I think tuan might have some too.

[Zen Reef]

I do. I have 5 or 6 different color combos of the un-named you can pick from. Then there are the named ones: la lakers, ring of fire, watermelon. There's others but I can remember at the moment.

[ramsey]

I have a JBJ and it works just fine. I just got done calibrating it using calibration fluid and it was 0.001 off which is not bad since I haven't calibrated it in 3 years. The calibration fluid is 1.0264 and the refractometer read 1.025, RODI water had a reading of 1.001. I had a hydrometer for about a month when I first got into the hobby and it was way off. A refractometer is worth every penny and one of the most important things you can have IMHO. Get calibration fluid and some RODI water to calibrate it and you're golden. You can also get digital refractometers for around $100. I've never used one though.