Oase Carbon Filter Media Test Kit suitable for up to a

suitable for up to a 4 gallon aquarium

Acid and break resistant

Algae Meal

Biological filtration is provided by the revolutionary and patented Bio-Wheel - proven best at removing toxic ammonia and nitrite

Oase Carbon Filter Media Test Kit suitable for up to aCarbon Filter Media helps to remove cloudy water, harmful metals, odors, tannins or other colors for clear, pure aquarium water. Activated carbon is processed to have small, low volume pores that increase the surface area available for absorption of unwanted substances. Timing to replace the carbon filter media varies upon aquarium size, number of fish and plants, and declines in filter performance. This is replacement media for the BioCompact 50,