Aquaforest Carbon is a high-quality steam-activated granular carbon that quickly removes impurities, discoloration, and cloudiness for crystal-clear water. Because it is activated by steam rather than phosphoric acid, it contains no phosphate. It also strips out medication residues and the allelopathic compounds corals release in their chemical warfare, making it ideal for mixed reef and ULNS systems as well as everyday fresh and saltwater tanks.Part of the Aquaforest reef range. Run it in your filtration to keep water clear and your corals healthy, and use it to polish water after medication.Features Steam-activated, phosphate-free. No phosphate leaching, unlike acid-washed carbon. Crystal-clear water. Removes discoloration, cloudiness, odors, and organic impurities. Removes toxins and med residues. Clears allelopathic compounds between corals and leftover medication. Fresh and saltwater. Ideal for mixed reef and ULNS tanks, and works in any freshwater or marine system. How to Use Saltwater: use 100 mL of Carbon per 27 gallons (100 L). Freshwater: use 100 mL of Carbon per 54 gallons (200 L). Place in an up-flow media reactor or a media bag. Replace every 4 weeks for best results. Specifications Brand Aquaforest Product Carbon (steam-activated granular) Size 1000 mL Phosphate None (steam-activated) Removes Discoloration, odors, toxins, medication residues Use Reactor or media bag Replace Every 4 weeks Water type Freshwater and Saltwater Made in Poland Recommended Pairings Aquaforest range, the rest of the reef dosing and care line. Filter media, for your reactor and filtration. Medication, after which carbon polishes out any residue. Corals, which thrive in clean, clear, low-toxin water. FAQWhy steam-activated carbon?It contains no phosphate, so it will not leach phosphate and feed algae the way acid-washed carbon can.How much do I use?Saltwater: 100 mL per 27 gallons. Freshwater: 100 mL per 54 gallons. Place it in a reactor or media bag.Can I use it after medicating?Yes. Carbon removes leftover medication and clears the water once treatment is finished.How often do I replace it?Every 4 weeks for best results.