Vettin2nite
Aquarium Advice Apprentice
From reading the posts i've decided to go with a refractometer instead of the swing arm i'm using now; has anyone used this model and if so what's your opinion ? TIAhttp://www.drsfostersmith.com/Product/Prod_Display.cfm?pcatid=9957&ref=3532&subref=AK&N=2004+113761