Product Description: Features: Extremely durable and washable (reusable) air diffusing media Manufactured with brown Adamantine Spar (corundum/alumina) under ultra high temperature and pressure. Applicable in Acidic or Alkaline waters (low or high pH) Ozone resistant Suitable for aquarium, koi pond, fish hatchery and aquaculture applications. Diameter: 1.9" Length: 12" Fitting Sizes: 1/4" + 1/2" barb, 1.5" spigot Form: Cylinder
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