Maxspect Nano-Tech Bio-Blocks are a highly efficient biological filter media designed to replace large quantities of live rock in both freshwater and marine aquariums. Utilizing stabilized microbial sewage treatment technology, these inert ceramic blocks provide an enormous surface area for beneficial bacteria to colonize. This bacteria rapidly breaks down ammonia, nitrite, and nitrate, creating a stable and healthy aquatic environment with a significantly smaller footprint than traditional filtration methods.

Each package contains two 4" x 4" x 1" blocks, which are completely inert and will not alter your water chemistry. A single block boasts an ultra-high surface area of over 11,635 square feet, capable of replacing up to 20 pounds of live rock. The stable ceramic base is designed to last indefinitely without decomposing over time, offering a permanent solution for your sump or filter. The total surface area per two-piece package can treat up to 750 gallons of water.

This product is ideal for aquarists seeking to maximize their biological filtration capacity, especially those with limited sump space or who prefer a minimalist aquascape. By reducing the reliance on live rock, hobbyists can create more open swimming areas for fish and better placement for corals. It's a perfect choice for reef keepers, fish-only saltwater enthusiasts, and freshwater aquarists who want powerful, compact, and long-lasting biological filtration.