Seachem Flourite Sand Color:Flourite Black Sand It includes AquaEl unique three-stage

It includes AquaEl unique three-stage Smart Day & Night LED lighting system

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but oxygen exchange and light penetration too

it makes fish keeping easy and visually appealing

excellent workmanship

Seachem Flourite Sand Color:Flourite Black Sand It includes AquaEl unique three-stageFlourite is a specially fracted stable porous clay gravel for the natural planted aquarium. Its appearance is best suited to planted aquaria, but may be used in any freshwater aquarium environment. Flourite 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 is not chemically coated or treated and will not alter the pH of the water.