Fluval Biological Aquarium Cleaner, 4 oz (120 mL) Saltwater Substrate Clear-Carb combines the benefits of

Clear-Carb combines the benefits of Carbon and Clearmax for fresh and saltwater aquariums

If using tap water

A patented refiltration system enables you to control water output while increasing dwell time within the filter

High nitrate levels in your aquarium indicate a build-up of fish waste and organic compounds

Fluval Biological Aquarium Cleaner, 4 oz (120 mL) Saltwater Substrate Clear-Carb combines the benefits ofFluval Biological Aquarium Cleaner helps reduce aquarium maintenance by cleaning gravel, power filters, decorations and interior surfaces. It reduces organic waste due to overfeeding, fish waste and other decaying material such as plant leaves. It is especially beneficial for goldfish, cichlid, and heavily populated aquariums. To further help ensure optimal water quality, use this product with Fluval Biological Enhancer to prevent and control