GC Tek Biological Media Media Type:AlphaONE (For AlphaONE Filters) A plug is included to

A plug is included to prevent the stones from falling out

cross-bar with wavy pattern

It does not clog and it resists channeling and compaction in up-flow or horizontal-flow pressure filters

Lifegard Aquatics Mechanical Filter Modules provide excellent particle filtration for aquariums

GC Tek Biological Media Media Type:AlphaONE (For AlphaONE Filters) A plug is included toShips directly from the manufacturer, typically in 5 7 business days Filter beads are a floating media. The more buoyancy the beads have, the more effective they are. To increase buoyancy, each bead has been injected with air during manufacturing. This way, the beads stay afloat and stay away from the outlet slots on the bottom laterals, preventing the laterals from being clogged, which would prevent debris from being flushed out of the filter. In