Aquarium Pre-Sump Filter Socks (4" Opening, 150/200 Micron Felt, Reef Tank Micron Bags)

Achieve crystal-clear reef water by capturing fine particles before they reach your sump with these Filter Socks! 🌊

• 🕸️ 150 & 200 Micron Options - choose your preferred filtration fineness for mechanical pre-filtration.
• 🔵 4" Standard Opening - fits standard pre-sump bulkhead sock holders used in most reef systems.
• 🧵 Felt Construction - high-quality felt captures fine detritus, uneaten food, and suspended particles.
• 🪸 Reef Tank Ready - prevents fine waste from fouling your refugium or biological filter media.
• ♻️ Washable & Reusable - rinse thoroughly and reuse to extend sock life and reduce replacement costs.