Aquatic Remedies Wild Lava Pure Black Gravel

The rare type of original black lava gravel, available in 2-5 mm size, perfect as a nutrient base for planted aquariums. This gravel retains moisture, supplies essential nutrients and trace minerals for aquatic plants, and serves as an excellent housing medium for beneficial bacteria. Ideal as a unique black bottom layer, it won’t alter the pH of your water and replenishes vital minerals for all types of aquatic animals.