Aqua Clean Bio Block (Marine Special) is a premium biological filtration media engineered specifically for marine and reef aquariums. Manufactured using high-grade inert ceramic (Al₂O₃), this bio block delivers exceptional biological performance while maintaining ultra-low phosphate and aluminum output, making it completely reef-safe.
Its open porosity structure allows high water flow without clogging, creating ideal conditions for beneficial bacteria to thrive and efficiently remove ammonia and nitrite, while helping to minimize nitrate buildup.
Specially designed for marine & reef systems
Ultra-low phosphate content (0.0274%) – safe for sensitive corals
Extremely low aluminum ion release (0.005 ppm) – well below drinking water limits
High open-pore structure for maximum water flow and oxygenation
Large surface area for superior beneficial bacteria colonization
Supports efficient ammonia & nitrite removal
Helps maintain stable, clear, and healthy reef water
Heavy metal tested under RoHS Directive (EU) 2015/863
Complies with Directive 2011/65/EU & RCP testing methods
All heavy metal test results: ND (Not Detected)
Made from Al₂O₃ (Aluminum Oxide) – chemically inert and reef-safe
Resistant to acids, alkalis, and wear
Commonly used in reef plugs and high-performance ceramic components
Designed to prevent aluminum leaching into aquarium water
Product Type: Biological Filter Media
Application: Marine & Reef Aquariums
Pack Size: 2 Bio Blocks per box
Reef aquariums (SPS, LPS, mixed reefs)
Marine fish systems
Sump or filter chamber biological filtration
Long-term, stable nitrogen cycle support
