<h2>OCEANIC SYSTEMS INC&#046; - OCEANIC BIOCUBE MINI HYDROMETER</h2><p></p><p>Biocube Mini Hydrometer can remain submerge in aquarium, letting you know your salt level at a glance&#046; Compact design allows for discreet placement in aquarium, will not interfere with view&#046; Ideal for saltwater aquarium and sumps&#046;</p><ul></ul>