Tweozek 8 Pack Air Stone for Biorb Aquariums, Flow/Halo Series, Fish Tank Stone, Aquarium Filter Accessories, Cylinders Fit Freshwater & Saltwater Aquariums (White)

[Universal Compatibility]: This air stones for fish tanks set is specifically designed to be compatible with aquariums, Flow/HALO Series 15 acrylic 4-gallon aquarium, as well as classic, tube, flow, halo, and life models. Please note: These are compatible replacements, not original brand air stones. [Ample Replacement Supply]: This value pack contains 8 airstones for aquariums, sturdily built for durability and shatter resistance. With this generous supply, you'll have spares ready for regular maintenance, ensuring your tank always has a fresh air bubbler for fish tank when needed. [Ample Replacement Supply]: This value pack contains 8 airstones for aquariums, sturdily built for durability and shatter resistance. With this generous supply, you'll have spares ready for regular maintenance, ensuring your tank always has a fresh air bubbler for fish tank when needed. [Tool-Free Installation & Replacement]: No tools required—simply remove your filter cartridge, swap out the existing air stones for fish tanks, and reattach it. The straightforward process makes regular maintenance quick and hassle-free. [Recommended Regular Replacement]: For consistent airflow and optimal system efficiency, we recommend replacing your airstones for aquariums every 3 months. Regular replacement prevents airflow reduction that can impact filter performance, keeping your air bubbler for fish tank working at peak efficiency.