Fluval BioMax is a top - notch filter media that creates an ideal space for beneficial bacteria to colonize and grow. Its one - of - a - kind bio rings come with a complex pore system. This system offers the perfect conditions for beneficial bacteria to thrive and multiply. Not only that, Fluval BioMax effectively cuts down and manages ammonia and nitrate levels in the water. It's a great fit for both freshwater and marine setups. Specifically designed for Fluval U2, U3, and U4 Underwater Filters, each pack weighs 170 grams (6 oz).

Using Fluval BioMax is super easy. First, open the pack and place the bio rings into your Fluval U2, U3, or U4 Underwater Filter. Make sure to follow the filter's instruction manual for the best placement. You can use it in both freshwater and marine aquariums. As for maintenance, check the filter regularly. If the water flow seems restricted, it might be time to rinse the bio rings gently with aquarium water. Don't use tap water as it can kill the beneficial bacteria. When changing the water in your aquarium, you can also take the chance to inspect the BioMax. If it's really dirty or damaged, it's a good idea to replace it. Keep it in a cool, dry place when not in use. That's all you need to do to keep your aquarium water clean and your fish happy!