FS : tap water filter and salinity refractometer

[Casey8]

Vertex Salinity Refractometer - $20

http://www.jlaquatics.com/product/ro-aptwp/Aquarium+Pharmaceuticals+Tap+Water+Filter.html

Aquarium Pharmaceuticals Tap water filter - $20 comes with the almost brand new cartridge.

[Casey8]

Salinity Refractometer is gone.