be careful there also - make sure to calibrate often. mine was reading 1.025 but my sg was actually 1.020 for at least two months. you know how i found out - you guessed it, swing arm

no single method is foolproof, so use more than one. i now use the refractometer (often checking calibration) and a floating hydrometer.

Quote Originally Posted by erikharrison View Post
For the love of your tank, ditch the swingarm, and get a refractometer.