Aqua Medic NP Biograin

Aqua Medic NP Biograin is a biological pellet filter media used in marine aquariums to reduce nitrate (NO₃) and phosphate (PO₄) through bacterial nutrient consumption.

Key specs

• Type: Biodegradable bacterial pellet media
• Use: Marine (saltwater) aquariums only
• Application: Fluidized bed / pellet reactor (e.g. Multi Reactor systems)
• Function: Biological reduction of nitrate & phosphate
• Method: Bacteria consume nutrients → exported via protein skimming

What it is for

• Reducing nitrate and phosphate levels naturally
• Controlling algae growth by lowering nutrients
• Creating a biological nutrient export system
• Producing bacterial biomass that can feed corals and filter feeders

Who it is for

• Reef aquarium hobbyists with nutrient (NO₃ / PO₄) issues
• Medium to advanced marine tank keepers
• Users running protein skimmers and reactors
• SPS/LPS coral systems needing ultra-clean water control

How to use (instructions)

• Use only in a fluidized pellet reactor (not filter bags or loose in tank)
• Fill reactor with NP Biograin
• Start flow so pellets are in gentle continuous tumbling motion
• Ensure strong protein skimmer is running at all times
• Allow 2–6 weeks break-in period for bacteria to develop
• Avoid letting pellets clump together (maintain constant movement)

 Dosage

• Starting dose: ~50 ml per 100 liters of aquarium water
• Normal operating dose: up to 100–200 ml per 100 liters
• Increase slowly every 1–2 weeks based on nitrate/phosphate readings
• Do not dose full amount immediately (risk of bacterial bloom)

Important notes

• Requires efficient protein skimming (essential)
• Can cause bacterial bloom or oxygen drop if overdosed
• Only for marine aquariums (not freshwater)
• Reactor flow must be gentle tumbling, not aggressive boiling
• Always increase dose gradually over time