1in Biological Frag Plugs with Mounting Divot IceCap's 1" Biological Coral Frag Plugs combine a dense arrangement of small ceramic spheres with an innovative shallow mounting divot design. This unique feature creates the ideal surface for mounting small corals while providing excellent vertical support for SPS fragments. The specialized divot design ensures proper coral positioning and stability, making these plugs particularly effective for delicate SPS corals that benefit from vertical orientation. The versatile design works perfectly as a mounting surface for most coral species. Coral attachment is simple and secure using cyanoacrylate super glue gel (sold separately) for reliable, professional-quality mounting. Base Dimensions (WxH): 1in x .25inDivot Dimensions (WxD): 8mm x 6mmTapered Stem Dimensions (WxL): 11-9mm x 16mmQuantity Per Bag: 25pcs Features Ultra-High Surface AreaNatural Tan ColorTextured Mounting SurfaceNeutral pH(7-7.5)Great for Frag FarmingTapered Stem Fits Most Frag TraysMounting Divot for Supporting Small Coral FragmentsWhy Biological Frag Plugs Are Superior to Traditional Plugs: Enhanced Coral Bonding - Porous ceramic sphere construction provides superior surface area that encrusting corals can naturally bond to, creating stronger, more stable attachmentsImproved Water Flow - Porous design allows water to flow freely through the plug, unlike solid traditional plugs that restrict circulationHealthy Bacterial Colonization - Increased surface area promotes beneficial bacteria growth without affecting pH levelsNatural Aesthetics - Natural coloration blends seamlessly into reef displays, eliminating the unsightly bright white contrast of traditional plugsReduced Algae Growth - Natural color reduces algae promotion compared to bright white traditional plugs that can become an eyesoreTrue Porosity - Unlike traditional plugs that may have surface texturing but remain solid and non-porous, biological plugs offer genuine porosity throughout