Kirby Coral Bones 20mm

Average size per piece is around 20mm. Great for all aquariums require a higher pH and also great for use in filtration systems. Great in aiding marine aquariums with -Alkaline -pH Buffer -Rich Calcium, Carbonate and trace element content -Natural and aquarium safe -Does not contain harmful chemicals -Porous body structure -Encourages propagation of beneficial bacteria -Highly effective alkaline buffer due to natural aragonite content -Calcareous algae, shells and coral fragments -Gradually dissolves, introducing calcium into the water. Aids in maintaining healthy GH levels. -Gradually dissolves, introducing calcium into the water. Aids in maintaining healthy KH levels.