About This

• Includes 1 x 5lb Bio activated bacteria seeded substrate and 1 x 10lb dry aquarium substrate
• Pure, natural, unique gravel - collected sustainably in New Zealand
• Naturally smooth rounded gravel, not chipped or crushed.
• Add the Bio Substrate for an instant cyled aquarium - for new or existing aquariums
• Screened and graded at 2-4mm