Seachem Flourite Black 7kg

Flourite Black™ is most effective when used alone as an integral substrate bed, but it may be mixed with other gravels.
Gravel modifiers such as laterite are not necessary. Flourite Black™ is not chemically coated or treated and will not alter the pH of the water.
Although pre-washed, it may be rinsed before use to remove residual dust. Dust can also be minimized by filling aquarium slowly and dispersing water so that the Flourite Black™ bed is not disturbed.
Slight initial cloudiness is normal and will clear rapidly (2–12 hours). To shorten the cloudiness period use Clarity™ in conjuction with mechanical filtration (such as filter floss).