Transform your aquarium's water chemistry with this premium crushed coral substrate. Perfect for freshwater aquariums, these natural coral fragments serve a dual purpose - they help maintain optimal pH levels while creating an attractive substrate layer. The 500g package contains carefully processed coral pieces with a porous structure that gradually dissolves to buffer water acidity. Ideal for aquarists looking to stabilize their tank's pH levels naturally, this substrate works continuously to maintain water parameters. The off-white, calcium-rich coral pieces can be used as a complete substrate or mixed with existing gravel for enhanced pH control. Whether you're setting up a new tank or maintaining an established aquarium, this crushed coral provides essential minerals while adding a natural aesthetic to your underwater environment. Suitable for both indoor and outdoor aquariums, this versatile substrate helps create the perfect habitat for your aquatic pets.