Seachem Flourish Tabs 40 Pack – Slow Release Plant Root Tablets

Seachem Flourish Tabs 40 Pack are slow-release root fertiliser tablets designed to deliver essential nutrients directly into the substrate where aquarium plant roots can access them.

Ideal for planted aquariums, aquascapes and root-feeding plants, Flourish Tabs provide a broad range of trace elements, minerals, vitamins and amino acids to support healthy root development and strong plant growth.

Simply insert the tablets into the aquarium substrate and allow them to release nutrients gradually over several months.

Key Features and Benefits

• Slow-release aquarium root fertiliser
• 40 tablet value pack
• Delivers nutrients directly to plant roots
• Ideal for rooted aquarium plants
• Contains iron, manganese, magnesium, calcium and potassium
• Includes essential trace elements, vitamins and amino acids
• No added phosphate or nitrate
• Helps support healthy root development
• Excellent for Cryptocoryne, Amazon Swords and Vallisneria
• Suitable for gravel, sand and planted substrates
• Easy to use
• Re-dose approximately every 3–4 months
• Will not alter aquarium pH when used as directed

Root Fertiliser for Aquarium Plants

Many aquarium plants absorb a significant proportion of their nutrients through their roots.

Flourish Tabs are designed to place nutrients directly into the root zone rather than relying only on nutrients present in the water column.

This makes them particularly useful for heavy root-feeding plants such as:

• Amazon Swords
• Cryptocoryne
• Vallisneria
• Tiger Lotus
• Aponogeton
• Other deeply rooted aquarium plants

Slow-Release Plant Nutrition

Once placed beneath the substrate, Flourish Tabs gradually release nutrients into the surrounding root zone.

This provides plants with ongoing access to important minerals without requiring frequent dosing.

Seachem recommends replacing the tablets approximately every 3–4 months for optimal plant growth.

Nutrient-Rich Formula

Flourish Tabs provide a broad range of nutrients that support aquatic plant roots.

The formula includes important elements such as:

• Iron
• Manganese
• Magnesium
• Calcium
• Potassium
• Sulfur
• Trace minerals
• Amino acids
• Vitamins

The tablets are also designed without added phosphate or nitrate.

Ideal for Inert Aquarium Substrates

Flourish Tabs are particularly useful in aquariums using substrates such as:

• Gravel
• Sand
• Decorative aquarium substrates
• Older aquasoils with reduced nutrient content

Inert substrates do not naturally provide significant plant nutrition.

By placing Flourish Tabs beneath rooted plants, nutrients can be concentrated where they are most useful.

Flourish Tabs & Aquasoil

Flourish Tabs can also be used in planted aquariums that already contain aquasoil.

Fresh aquasoil may initially provide significant nutrients, but nutrient availability can decline over time.

Adding root tabs to older planted substrates can help replenish nutrients around established root systems.

How to Use Seachem Flourish Tabs

Insert approximately:

1 Flourish Tab for every 10–15cm radius of substrate.

Distribute tablets evenly around the planted area.

Push each tablet approximately halfway into the gravel or substrate bed.

For optimal growth, replace the tablets approximately every:

3–4 months.

A standard 38-litre aquarium requires approximately six tablets when dosing the entire substrate bed according to Seachem's directions.

Best Placement for Root Tabs

Place Flourish Tabs close enough to plant roots for nutrients to become available, but avoid positioning them directly against delicate crowns or rhizomes.

For large established plants such as Amazon Swords, tabs can be positioned around the root zone.

For groups of Cryptocoryne or Vallisneria, distribute several tabs through the planted area.

Flourish Tabs for Amazon Swords

Amazon Swords are strong root feeders and can benefit significantly from substrate fertilisation.

Place Flourish Tabs within the root zone to provide access to iron, potassium and other nutrients needed for healthy leaf and root development.

Large established Sword plants may require more than one tab depending on the size of the root system.

Flourish Tabs for Cryptocoryne

Cryptocoryne species develop extensive root systems and are particularly well suited to root fertilisation.

Flourish Tabs can help provide long-term nutrients beneath the substrate without requiring frequent disturbance of established plants.

Flourish Tabs for Vallisneria

Vallisneria spreads through runners and can develop a large root network throughout the aquarium substrate.

Root tabs distributed through a Vallisneria planting area can help support healthy growth and spreading.

Flourish Tabs vs Liquid Fertiliser

Root tabs and liquid fertilisers deliver nutrients in different ways.

Flourish Tabs target the substrate and plant roots.

Liquid fertilisers primarily add nutrients to the aquarium water column.

Root-feeding plants may benefit particularly from substrate fertilisation, while stem plants and plants that absorb nutrients through their leaves may benefit more from liquid supplementation.

Some planted aquariums can benefit from using both methods depending on the plant species being grown.

Do Flourish Tabs Cause Algae?

Flourish Tabs contain no added phosphate or nitrate specifically intended to promote algae growth.

Because the tablets are inserted beneath the substrate, nutrients are concentrated around plant roots rather than being freely released throughout the water column.

As with any aquarium fertiliser, use the recommended dose and maintain balanced lighting, CO2 and nutrients.

Product Specifications

Frequently Asked Questions

What are Seachem Flourish Tabs used for?

Flourish Tabs are slow-release root fertiliser tablets designed to provide nutrients directly to aquarium plant roots.

How often should Flourish Tabs be replaced?

Seachem recommends adding new tablets approximately every 3–4 months for optimal plant growth.

How far apart should Flourish Tabs be placed?

Use approximately one tablet for every 10–15cm radius of planted substrate.

Are Flourish Tabs good for Amazon Swords?

Yes. Amazon Swords are strong root feeders and are excellent candidates for root fertilisation.

Are Flourish Tabs good for Cryptocoryne?

Yes. Cryptocoryne species absorb significant nutrients through their root systems and can benefit from Flourish Tabs.

Can I use Flourish Tabs with gravel?

Yes. Flourish Tabs are particularly useful in inert gravel where naturally available plant nutrients may be limited.

Can I use Flourish Tabs in sand?

Yes. They can be inserted underneath aquarium sand near plant roots.

Can I use Flourish Tabs with aquasoil?

Yes. They can supplement aquasoil, particularly as an established substrate becomes depleted over time.

Do Flourish Tabs contain nitrate or phosphate?

Seachem states that Flourish Tabs contain no added nitrate or phosphate.

Do Flourish Tabs affect aquarium pH?

They should not significantly alter pH when used as directed. Seachem notes that in very soft or poorly buffered water they have mildly acidic properties.

Can I use Flourish Tabs with Seachem Flourish liquid fertiliser?

Yes. Seachem notes that the products can be used together where both root and water-column nutrition are beneficial.

Do I need to remove old Flourish Tabs?

No. The tablets gradually break down within the substrate and do not normally need to be removed.