🌊 Dive into cleaner waters with Fluval! Reduce waste with reusable ceramic rings. Say goodbye to frequent filter changes! Long-lasting filtration that stands the test of time. Perfect for both freshwater and saltwater setups. Traps large and medium particles effortlessly. Freshwater & saltwater Mechanical filtration Eco-friendly design Fluval Pre-Filter Media is a high-performance mechanical filter media designed for aquariums. This 26.45 oz. pack of solid ceramic rings effectively traps large and medium particles, preventing clogging of finer filter media and extending the lifespan of your filtration system. Ideal for both freshwater and saltwater environments, it promotes a healthier aquatic ecosystem while reducing the frequency of filter media replacements.