Marina T Connector allows to split air coming from the air pump into two even and constant air streams to separate air-driven devises in aquarium. The plastic and non-corrosive connector is safe for use in salt water aq
Cube, Individual cubes for density experiments, Available in eight different materials: acrylic, aluminum, brass, copper, nylon, polypropylene, PVC, and steel, Each material is represented by a 1/2inch, 1inch and 11/2inch cube
Cube, Individual cubes for density experiments, Available in eight different materials: acrylic, aluminum, brass, copper, nylon, polypropylene, PVC, and steel, Each material is represented by a 1/2inch, 1inch and 11/2inch cube
Marina Standing Thermometer - Celsius and Fahrenheit, designed to sink to the bottom of the aquarium and remain in a vertical position, Centigrade, Has a safety zone temperature range indicator for most tropical fi