AquaNatural Midnight Pearl Bio-Substrate 5lb for Aquariums, Gravel seeded Start up bio Active nitrifying Bacteria 2-4mm, Brown, Black, Gold, Small (BIOFRESH003) (Pack of 2) - size: Small (Pack of 2)

About this item

• The information below is per-pack only
• Bio-Active Live Bacteria: Seeded with bio active live nitrifying bacteria to establish beneficial colonies in your aquarium
• Pure Natural Material: Made from 100% pure natural gravel that is sustainably sourced, triple washed and kiln dried
• Versatile Application: Use as a primary substrate or mix with Midnight Pearl substrate for enhanced biological filtration
• Instant Cycling Technology: Cycles aquarium instantly with patented blend of live nitrosomonas and nitrobacter bacteria that convert harmful ammonia into nitrates
• Optimal Grain Size: Features 2-4mm gravel particles providing large surface areas for beneficial bacteria colonies and easy maintenance
• Natural Color Palette: Available in attractive brown, black, and gold tones that create natural beauty in any aquarium setup

Overview

• Product Dimensions ‏: ‎ 9.45 x 3.15 x 5.51 inches; 9.96 pounds
• Item model number ‏: ‎ BIOFRESH003
• Date First Available ‏: ‎ January 23, 2026
• Manufacturer ‏: ‎ Pisces USA
• ASIN ‏: ‎ B0C8TYRZ89
• Best Sellers Rank: #107,555 in Pet Supplies (See Top 100 in Pet Supplies) #156 in Aquarium Gravel
• Customer Reviews: 4.9 4.9 out of 5 stars (30)