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 Deluxe Planter Scraper, 4-in1 tool has two-sided scraper pad that is suitable for glass and acrylic aquariums: the soft yellow sponge side removes soft algae or slime; the abrasive green nylon pad for remov
FLUVAL Underwater Filter BIOMAX, provides an optimal environment for the colonization and growth of beneficial bacteria. The unique bio rings have a complex pore system that provides an optimal environment where b
FLUVAL U3 Poly/Carbon Cartridge, 2 Pack, Cartridge has two sides that combine to provide thorough and effective chemical filtration, the crucial second stage in the filtration process. The polyester filter pad side