Seachem Flourite Dark is a specially fracted, stable, and porous clay gravel designed specifically...Seachem Flourite Dark is a specially fracted, stable, and porous clay gravel designed specifically for the natural planted aquarium. Its appearance is ideal for planted tanks, though it performs excellently in any freshwater environment. This substrate is most effective when used as the primary substrate bed, but it can also be mixed with other gravel types. It is not chemically coated or treated, meaning it will not alter the pH of your water. Because it is a natural product, it is permanent and does not need to be replaced. One 7kg bag provides approximately 5,500cm3 of volume. While pre-washed, it is recommended to rinse the product before use to remove any residual dust from transit. To maintain water clarity during setup, fill the aquarium slowly to avoid disturbing the gravel bed.
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Seachem Flourite Dark is an ideal substrate choice for aquarists looking to create a visually striking, high-contrast natural planted aquarium. It offers a permanent, nutrient-rich, and porous clay foundation that supports healthy plant root growth without altering water chemistry, though users should be prepared for a thorough rinsing process before installation to ensure initial water clarity.
All features
Brand
Seachem
Extended Product Information
FAQs
Does Seachem Flourite Dark change the pH of my water?
No, it is chemically inert and will not buffer or alter your aquarium pH.
Do I need to replace this gravel after a year?
No, Flourite is a permanent substrate and does not need to be replaced.
Can I mix this with other gravel types?
Yes, you can mix it with other substrates, though it is fully functional on its own.
Is this safe for bottom-dwelling fish?
Yes, the substrate is safe, though it is recommended to ensure your fish species prefer this texture.
How much does one 7kg bag cover?
One 7kg bag provides approximately 5,500cm3 of volume.
Troubleshooting
The water became very cloudy after filling the tank.
This is likely residual dust. Let the filter run; it will clear the water within 12 to 24 hours. In the future, rinse the substrate more thoroughly.
Plants are floating to the surface.
Ensure the plants are buried deep enough into the gravel. Use planting tweezers for precision or add a small rock to weigh down the stems until roots establish.
Pros and Cons
Pros
Permanent substrate that never needs replacement
pH neutral and chemically inert
Excellent for healthy root system development
Stunning dark aesthetic for high-contrast aquascaping
Porous structure aids in biological filtration
Cons
Requires significant rinsing before use to remove dust
Heavier than some alternative substrates
Can cause cloudiness if water is added too quickly during setup
Setup, Compatibility & Care
Rinsing: Pour the contents of the bag into a bucket and rinse thoroughly with a hose or under a tap until the water runs relatively clear to minimize dust.
Placement: Add the gravel to your dry aquarium, sloping it higher in the back to create depth.
Filling: Place a plate or plastic bag over the substrate and pour water slowly onto it. This disperses the energy of the water flow, preventing the gravel from being disturbed and keeping your water clear.
Compatibility: Safe for all freshwater community tanks, including shrimp and sensitive fish species. It is compatible with all freshwater filters and does not require special equipment.