The MarinePure Bio Filter Media Pods offer a powerful solution for maintaining water quality in aquariums, ponds, and aquaculture setups. Measuring about 3.1 inches in diameter, each pod is designed with grooves to create a randomized water current, maximizing water and media contact. With the equivalent surface area of over 5,000 plastic bio-balls, just one pod can efficiently handle a significant amount of filtration. The unique design enhances durability, and the deep cross-section aids in nitrate control. This package includes 3 pods, providing effective filtration for up to 100 gallons of ammonia elimination, ensuring a cleaner and healthier aquatic environment for your marine or freshwater ecosystem.