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psychographic · 05-05-2008, 10:29 PM

I change 5 gallons of water religiously every Sunday and since my refractometer drifted off calibration months ago, I calibrate it each week just before testing my new water.

05-05-2008, 10:29 PM	#9 (permalink)
psychographic Senior Member iTrader: (2) Join Date: Dec 2007 Posts: 1,441	I change 5 gallons of water religiously every Sunday and since my refractometer drifted off calibration months ago, I calibrate it each week just before testing my new water.