hey, i have the deep six hydrometer. i've been using it for about 2weeks now. i just wanted to make sure it's accurate and see what the variance is. i tried going to fish-town, but they use the deep six to test their water too. anyone know a store that will check my sg with a refractometer? or would anyone be willing to use refractometers to help me check? i can bring some water over to your place. thank you.
tony
tony