nitrifying bacteria bio cycle material: It is used to absorb harmful bacteria in swimming pools or other water systems. It is a supporting equipment for filtering under sand in the aquarium.

high grade bio porous filter media: High grade bio porous filter media, not easy to break and durable for long time use. It is made of high grade bio porous filter media.

brownish red: The blue indicator light is used to distinguish yellow and purple, and it is secondary at night, so as to avoid a large amount of blue light in normal use.

fish guard: Great for all types of aquarium, including fish guard, air filter and others. The biodegradable and nonwoven fish guard can effectively prevent the aquarium from being damaged, while also allowing you to have more time to use it.