Seachem Flourite Dark is a specially fracted stable porous clay gravel for the natural planted aquarium. Although it may be mixed with other gravels, Flourite Dark is best used as an integral substrate bed. Any mixture should be at least half flourite. Gravel modifiers such as laterite are not necessary. Flourite Dark is not chemically coated or treated, and will not alter the ph of the water. Although pre-washed, it should be rinsed before use to remove residual dust. Slight initial cloudiness is normal and will clear rapidly.
For added convenience, this 3.5 kg bag features an innovative mesh bottom that enables you to rinse your gravel right in the bag!