BLACK WATER 250ML Rainbow The sponge is designed to

The sponge is designed to reduce nitrate levels in the aquarium

Enhance your underwater world with our high-quality Aquarium Decorations

Control the light with the included adaptor to create the perfect atmosphere for your fish

despite not having expelled much energy

Physical filtering

BLACK WATER 250ML Rainbow The sponge is designed toEstablishes similar water conditions to those found in blackwater rivers that is important to many aquarium fish and plants. Help simulate the onset of the rainy season for encouragement of fish spawning. Enhances the effectiveness of plant nutrient solutions in aquariums. Increases the availability of important nutrients such as iron calcium magnesium molybdenum copper manganese zinc cobalt and nickel. Made in the USA.