Vinyl Air Tube for Marchisio Variable Volume Tanks | 90 cm Diameter itemID-29808 Salinity refractometer: SmartRef determines the

Salinity refractometer: SmartRef determines the salt content in your saltwater aquarium and pool in salinity specific gravity (SG 20/20)

3" (d) x 16

Silver Case

It also promotes a more favorable environment for malolactic fermentation to proceed by reducing overall acid stress

multiple element ports

Vinyl Air Tube for Marchisio Variable Volume Tanks | 90 cm Diameter itemID-29808 Salinity refractometer: SmartRef determines theReplacement air tubes for variable capacity tanks. 90 cm tube fits LA Inox 800 1000 Liter tanks. Please note: These tubes are only compatible with Marchisio brand tanks. They will not work with Speidel or other brands of variable volume tanks.