Parameters

[dbdavid]

JAWS
Is that stuff all digital?

The PH pen is I beleive. Check out the site:

http://aquariacanada.com/osCommerce/...db66400e0b2953


REEF_RAF
Plastic swing arm calibrated against a refractometer - about $12

I had the plastic swing arm checked against a glass hydrometer when I bought it some 10 years ago(refractometers were not available then ). I guess over time something happened to the swing arm.


Dave