Sera Alder Cones (50 pcs.)

Sera Alder Cones naturally lower pH and tannin levels in freshwater aquariums, creating ideal conditions for blackwater biotopes and sensitive species. Each cone gradually releases beneficial compounds while providing a natural aesthetic. This 50-piece set offers extended treatment duration, making it economical for established tanks or multiple setups. Safe for all freshwater fish and plants. Replace cones every 4–6 weeks for optimal water chemistry management.