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These bases are hollow so that they can be filled with sand or gravel
These EPDM rubber membrane air diffusers are incredibly strong and ideal for pond aeration
Made from 35% to 445% recycled rubber (there is no certification available to validate the source of the recycled material)
low energy consumption and reliable service
It is necessary to add small stones to the inner tube to keep the diffuser weighted at the bottom of your pond or lake (only the MTD-300W comes pre-weighted)
Matala Hakko Standard Air Manifolds Size:12 Outlets These bases are hollow soHakko Metal Air Manifolds connect your air pump outlet into multiple air lines, with even more outlets than the heavier duty brass manifolds. In most cases, Practical Garden Ponds still recommends Matala's heavy duty brass manifolds, since each outlet is fully adjustable. As such, they offer more of an option to adjust flow rates through different air stones and help eliminate back pressure. SKU Description 6WAY 6 way metal air manifold 12WAY 12 way
