Large marine coral for sale *Benefits of dried coral for the aquarium *1. Raises water alkalinity pH and KH* - Coral is made of calcium carbonate, dissolves slowly and raises the pH - *Beneficial if*: Tap water is acidic or your KH is zero *2. Natural source of calcium* - Releases calcium into the water 24 hours *3. Home for beneficial bacteria* - Coral has many pores where bacteria that clean the water from ammonia live - Works as a natural biological filter *4. Natural decoration* - Looks nicer than plastic and gives the tank a marine look Natural, original dried marine coral Size: Approximately 15 cm Weight: Heavy and stable, does not float Cleanliness: Needs washing Important: Suitable for African cichlid and saltwater tanks only Raises pH and KH - not suitable for shrimp, tetra, and plants