• Biological filter medium designed to maximize biological degradation performance in aquariums. • Provides optimal conditions for the settlement of cleaning bacteria, thanks to its spherical shape and high apparent density. • Ensures clear and healthy water, with stable water values and prolonged filtration times. • Effectively reduces nitrite spikes, is washable and reusable. • Suitable for freshwater and saltwater aquariums. • Package dimensions: 14.2 cm long x 6.2 cm high x 6.4 cm wide. • Product weight: 0.23 kg.