If you are going to the MASM Swap tomorrow (April 17, 2011), bring your TDS meter and refractometer for a free calibration.

I will be calibrating the meters with accurate & precise calibration standards with a 35ppt saline standard and Tom from CalmSeasQuest will be providing the TDS meter and calibration standard.

Even if you use a swing arm or hydrometer, it can be calibrated! If you bring it in, I will calibrate or provide the offset correction so that you can accurately measure your salinity and Total Dissolved Solids (TDS) for your tank.

Check it out....I will be manning the MASM Swap Calibration Station table