Marina air stone is ideal for adding accents in any aquarium the air stone diffuses air, creating water movement, increases surface agitation, accelerates oxygen replenishment, release carbon dioxide build-up, Rec
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 Easy Catch Fish Nets make managing and handling fish very easy and convenient. Made with loosely-weaved nylon mesh, the nets allow easy, unhindered movement with minimum water resistance, Net size: 4 x 3 in,
Density 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
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