These manifold systems tie multiple diffusers together to allow more airflow over a wider area. These are specifically designed for Koi Ponds, Aquaponic and Hydroponic systems. Small manifolds feature 1"x1"x3" airstones, while large manifolds feature 1.5"x1.5"x3" air stones. Each manifold comes with multiple air line fittings for ease of assemnly, and full assemnly and care instructions.
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