Aquarium gravel with precise grading to permit free flow of nutrients and oxygen to nitrifying bacteria. Keeps water clear. Resists packing channeling and anaerobic dead spots beneath decor.
- Aids in the growth of corals
- Buffers for the life of the aquarium
- Helps maintain a proper pH of 8.2 without constant chemical additions
- Discourages nuisance algae growth
Don't settle for an ordinary gravel. Natural dramatic colors and textures combined with pH support characterize our CaribSea Coraline Aquarium Gravel products. These are coarser materials suitable for most undergravel filtration and fish systems or as an accent for finer sands anywhere where elevated pH values are desirable. Consider the Coraline products in brackish or Cichlid aquariums (Central American or African). Our substrates are purposely engineered and free of impurities such as ash, metals, pesticides, and silica which allows you to create a safe and beautiful environment for your fish and invertebrates. Precision grading makes system design a breeze!