1. This yellow square column bacterial house features an innovative porous structure with over 800 micro-level pores per cubic centimeter, providing 3 times the attachment area of ordinary filter media for nitrifying bacteria. The square column shape fits various filtration devices (universal for top filters, bottom filters, and filter buckets), stacking tightly without shaking to boost the aquarium's biochemical filtration efficiency by 200%.

2. As professional nitrifying bacteria cultivation filter media, this bacterial house is made of nano-grade clay sintered at high temperatures. Its rough and porous surface is rich in minerals, quickly adsorbing ammonia nitrogen and nitrite in aquarium water. Test data shows that with an air pump aeration environment, a stable nitrifying bacteria colony can form within 3 days, maintaining clear water quality for the long term.

3. Unlike ordinary bio-cotton or ceramic rings, the yellow square column bacterial house uses high-density ceramization technology, with a pH resistance range of 4.5-10.5, suitable for fresh water, salt water, and other water quality types. After tens of thousands of water circulation tests, it remains structurally intact after 5 consecutive years of use, eliminating the need for frequent replacement and reducing fish-keeping costs.

4. This high-efficiency bio-chemical bacterial house can be flexibly used in small/medium fish tanks, large fish ponds, turtle tanks, planted tanks, and saltwater tanks. The square column length is precisely designed at 10cm, fitting standard drip box/filtration  sizes, no cutting required—directly install into the filter system, making it easy for beginners to upgrade their filtration system.

5. Using environmentally friendly yellow coloring technology, the surface color of the bacterial house changes visually with the usage cycle: bright yellow when clean, gradually turning dark tan as bacteria mature. No need to disassemble the filter media—judge the activity of the nitrification system by color, making water quality management more worry-free.