The BOYU CR-300 Ceramic Rings are high-quality biological filter media designed to improve water quality by providing an excellent surface for beneficial bacteria colonization. Their porous structure and hollow design ensure maximum filtration efficiency, making them ideal for both freshwater and marine aquariums.

Features:

🌊 Efficient Biological Filtration – reduces ammonia, nitrite & nitrate naturally

🧱 Porous & Hollow Structure – provides large surface area for bacteria growth

💧 Durable & Long-Lasting – maintains efficiency over years of use

🐟 Safe for Aquatic Life – does not alter water chemistry

🦐 Versatile Use – suitable for aquariums, sump tanks, canister filters, and ponds

Specifications:

Model: BOYU CR-300

Type: Ceramic ring filter media

Material: High-quality ceramic

Packaging: Factory sealed pack (standard BOYU pack)

Use: Biological & mechanical filtration

How to Use:

Rinse with aquarium water before first use (do not use soap or tap water)

Place inside filter chamber or media bag for best results

Replace only when crumbled or clogged (lasts for years)