Flourite Black Sand - 15.4 lb.

SKU: 245726
Manufacturer: Seachem
MPN: 3525

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Flourite is a unique gravel specifically designed for the planted aquarium. Essential nutrients are already in the gravel, so no supplements are needed. It can be mixed with other gravel or used alone. For best results at least half of the substrate mixture should be of Flourite.
Freshwater only.

The size and color of the gravel and substrates listed can vary due to natural availability and the resolution of your computer monitor.

For help selecting how much gravel you need for your aquarium, check our Aquarium Substrate Buying Guide.


Package Size15.4 lb.
Internal Id


Analysis(in mg/kg):
Aluminum, 33510
Barium, 19
Calcium, 20950
Cobalt, 4
Chromium, 7
Copper, 17
Iron, 4338
Potassium, 374
Magnesium, 1868
Manganese, 1868
Sodium, 5484
Nickel, 9
Vanadium, 11
Zinc, 9


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 bed is not disturbed. Slight initial cloudiness is normal and will clear rapidly (2–12 hours). To shorten the cloudiness period use Seachem Clarity in conjuction with mechanical filtration (such as filter floss).

Ratings & Reviews

3 reviews

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I have noticed a lot less food waste using this sand compared to standard aquarium gravel/rocks. It's not as "black" as I thought it would be. Even after rinsing (and rinsing and rinsing...) this sand I notice that it has light sandy reflectiveness to it. Not sure if that is common or not as this is my first time using sand. Overall, it is much better looking and cleaner than the stone I used for years. Haven't had too many problems with my fish uprooting my plants - they prefer to mow them down and eat them. Wasn't cheap at well over $100 spent upgrading to sand in my planted tropical 75 gallon tank, but I like it.

Must have for planted aquarium.


I had standard gravel before and my plants died. This sand is great and my new plants are growing just after a week of recieving them in the mail in the cold winter weather. Greal stuff and worth the money. thanks

be careful! !


This sand is extremely difficult to work with. I only have a 10 gallon, and i had to rinse this for 20 minutes, and do two complete water changes because it is getting so murky and sludgy. It has been sitting for 40 minutes now and is still just as murky as when I put it in