Seachem Flourite Sand 3.5kg – Planted Aquarium Substrate

Create a long-lasting foundation for your planted aquarium with Seachem Flourite Sand 3.5kg, a naturally porous clay substrate designed for freshwater planted aquariums.

Unlike active aquasoils, Flourite Sand is a stable planted aquarium substrate that does not require replacement as its effectiveness doesn't diminish over time. It is also not chemically coated or treated and is designed to have minimal impact on aquarium pH.

Its fine texture and natural appearance make it an excellent choice for planted aquariums and aquascapes where you want a plant-friendly substrate without deliberately altering your aquarium's water chemistry.

Flourite Sand can be used on its own as the complete substrate bed or incorporated into an aquascape with other suitable aquarium substrates.

Key features and benefits

• Designed for planted aquariums – Made specifically for use in freshwater planted tanks.
• Porous clay substrate – Provides a suitable substrate environment for aquatic plant roots.
• Stable and long-lasting – Does not need to be periodically replaced because of nutrient depletion.
• Minimal effect on pH – A good option when you don't want an active substrate deliberately changing aquarium water chemistry.
• Fine sand-like texture – Creates a natural-looking substrate bed for planted aquariums and aquascapes.
• Can be used on its own – Suitable as the complete substrate bed without needing to be mixed with another material.
• Not chemically coated or treated – A natural porous clay substrate rather than coated decorative gravel.
• 3.5kg pack – Convenient for smaller planted aquariums, nano setups, aquascaping areas or combining with additional bags for larger tanks.

Product specifications

Brand: Seachem
Product: Flourite Sand
Pack Size: 3.5kg
Substrate Type: Porous clay planted aquarium substrate
Suitable for: Freshwater planted aquariums and aquascaping
Water Chemistry: Stable substrate with minimal effect on aquarium pH
Use: Can be used as the complete aquarium substrate bed

What is Seachem Flourite Sand?

Seachem Flourite Sand is a porous clay-based substrate designed specifically for planted freshwater aquariums.

It provides a permanent substrate bed for aquatic plants without functioning like an active aquasoil.

This makes Flourite particularly useful for aquarists who want a plant-friendly substrate while maintaining greater control over aquarium water chemistry.

It can be used throughout the entire aquarium or incorporated into particular areas of an aquascape.

Flourite Sand vs aquasoil

Flourite Sand and active aquasoil can both be used in planted aquariums, but they work differently.

Active aquasoils can influence aquarium water chemistry and may lower or buffer parameters such as pH and hardness. Their properties can also change as the substrate ages.

Seachem Flourite Sand is a stable porous clay substrate designed to have minimal effect on aquarium pH.

This makes Flourite a strong choice when you want a permanent planted substrate without deliberately creating the softer, more acidic conditions associated with many active aquasoils.

Is Seachem Flourite Sand good for aquarium plants?

Yes. Flourite is specifically designed for use in planted freshwater aquariums.

The porous clay structure provides a suitable substrate environment for aquatic plant roots and can be used as the primary substrate bed.

Like any planted aquarium, plant growth also depends on factors including lighting, carbon dioxide availability, water-column nutrients and the requirements of the particular plant species being grown.

Does Flourite Sand contain fertiliser?

Flourite is best thought of as a plant-friendly mineral substrate rather than a bag of fertiliser.

It provides a stable, porous substrate for plant roots but does not remove the need to consider the nutritional requirements of your aquarium plants.

Depending on your plants and aquarium setup, additional fertilisation through root tabs or water-column fertilisers may still be appropriate.

Does Flourite Sand change aquarium pH?

Seachem Flourite is designed to have minimal impact on aquarium pH.

This is one of its key differences from active aquasoils, which are often specifically chosen because they influence water chemistry.

If maintaining particular water parameters is important for your fish, shrimp or plants, always test your aquarium water regularly rather than relying on the substrate alone.

Does Flourite Sand need replacing?

One of the major advantages of Flourite is its longevity.

Unlike substrates that rely on a limited initial nutrient supply or temporary buffering capacity, Flourite is designed to remain a stable part of the aquarium substrate bed.

This makes it particularly appealing when setting up a planted aquarium that you don't want to periodically dismantle simply to replace the substrate.

How to use Seachem Flourite Sand

Before adding Flourite Sand to your aquarium, follow the preparation instructions supplied with the product.

Place the prepared substrate into the aquarium and shape it to suit your aquascape.

For planted tanks, you can create a shallower foreground and gradually increase the depth toward the rear. This provides additional rooting depth and can create a stronger sense of perspective.

Plant aquatic plants carefully into the substrate before filling the aquarium.

Add water slowly to minimise disturbance to the substrate bed.

Does Seachem Flourite Sand need rinsing?

Flourite products can contain fine dust from transport and handling, so pre-rinsing is recommended before use.

Rinse carefully until much of the loose dust has been removed. Some initial cloudiness may still occur when the aquarium is first filled.

Adding water slowly and avoiding directing a strong flow straight onto the substrate will help minimise disturbance.

How much Flourite Sand do I need?

The amount required depends on the length and width of your aquarium and the substrate depth you want to create.

A 3.5kg bag is useful for:

• Smaller planted aquariums
• Nano aquascapes
• Foreground areas
• Creating specific planted zones
• Adding to an existing Flourite substrate bed

Larger aquariums will generally require multiple bags or a larger pack size.

For planted aquariums, substrate depth is often varied throughout the aquascape, with deeper areas used where additional rooting depth or elevation is required.

Frequently asked questions

What is Seachem Flourite Sand?

Seachem Flourite Sand is a porous clay substrate designed specifically for planted freshwater aquariums. It provides a stable, long-lasting substrate bed for aquatic plants.

Is Flourite Sand an aquasoil?

No. Flourite Sand is better described as a stable porous clay planted substrate. Unlike many active aquasoils, it is not designed to significantly alter aquarium pH or hardness.

Does Flourite Sand contain nutrients?

Flourite is a mineral-rich clay substrate but should not be treated as a complete replacement for aquarium plant fertilisation. Additional nutrients may be required depending on the plants and aquarium setup.

Do I need root tabs with Flourite Sand?

That depends on the plants being grown and your overall fertilisation method. Heavy root-feeding plants may benefit from appropriate root fertilisation.

Does Flourite Sand affect pH?

Flourite is designed to have minimal effect on aquarium pH, making it useful when you want a planted substrate without the buffering effects associated with active aquasoils.

Do I need to rinse Flourite Sand?

Yes. Pre-rinsing is recommended to remove loose dust created during transport and handling. Fill the aquarium slowly after adding the substrate to minimise cloudiness.

Does Flourite Sand need to be replaced?

Flourite is designed as a long-lasting substrate and does not need routine replacement simply because the substrate has aged.

Can I use Flourite Sand as the only substrate?

Yes. Seachem Flourite Sand can be used as the complete substrate bed in a planted freshwater aquarium.

Is Flourite Sand suitable for shrimp tanks?

It can be used in freshwater shrimp aquariums where its stable water-chemistry characteristics suit the shrimp species being kept. Unlike active aquasoils, it should not be relied upon to create softer or more acidic water.

Need a different planted aquarium substrate?

Aquaholics Online stocks a range of planted aquarium substrates and aquasoils for different aquarium setups.

If you're looking for an active substrate that can influence water chemistry, consider our Nisso Plant Soil range.

For general aquarium sand, gravel and decorative substrates, browse our Aquarium Substrate, Gravel & Sand range.