Seachem Flourish Iron 500ml – Aquarium Iron Supplement for Plant Growth & Colour | India

Seachem Flourish Iron 500ml is a highly concentrated ferrous iron (Fe) supplement for planted aquariums — the targeted fix for iron deficiency, the most common cause of pale, yellowing new leaves (chlorosis) and weak red colour in aquatic plants. Iron is the micronutrient plants need most for chlorophyll and red pigments, and fast-growing or red plants often run short. Dosing Flourish Iron restores deep green growth and intensifies reds. This is the larger 500 ml size for bigger tanks or regular dosing — premium Seachem quality for planted tanks in India.

What is Seachem Flourish Iron?

Short answer: A concentrated iron supplement that fixes iron deficiency and boosts plant colour.

Iron is essential for chlorophyll (green colour) and the pigments that make red plants red. It is used quickly and easily depleted, so planted tanks — especially with red or fast-growing plants — often run low. The classic sign is pale or yellow new leaves with green veins. Flourish Iron supplies iron in the ferrous (Fe²⁺) form plants take up most readily. For red plants, pair it with Sunken Garden Red. Full detail in our iron fertilizer & deficiency guide.

Key Features

• Concentrated ferrous iron — the form plants absorb most easily.
• Fixes iron deficiency — pale/yellow new leaves turn green again.
• Boosts red & green colour — iron drives plant pigments.
• Premium Seachem quality — a trusted planted-tank brand.
• Larger 500 ml size — better value for bigger tanks.

Benefits

Immediate: A targeted iron boost for tanks running short.

Short-term: New leaves come in deep green; reds intensify.

Long-term: Consistent colour and growth with iron no longer limiting.

How It Works

Dosed into the water, Flourish Iron supplies ferrous iron that plants absorb through their leaves to build chlorophyll and pigments. When iron is short, new growth turns pale or yellow while veins stay green. Restoring iron returns plants to healthy colour. Red plants also need strong light to colour up. See our deficiency guide.

How to Use

1. Dose by your tank’s water volume, following the Seachem label.
2. Typically dosed a few times a week, after a water change.
3. Use when new leaves go pale, or to push red colour.
4. Start at the lower dose and adjust to your plants.

Suitable For

• Tanks with iron deficiency (pale/yellow new leaves)
• Red and colour plants needing extra iron
• High-tech, fast-growing and larger tanks
• Aquarists dosing micros individually

Not Ideal For

• As a sole fertilizer — it supplies only iron
• Those wanting one bottle — all-in-ones already contain iron

Specifications

Problems It Solves

Pale/yellow new leaves: the classic iron fix. Dull or green-staying red plants: iron deepens colour. Slow growth from low iron: removes the bottleneck.

Flourish Iron vs Other Options

Expert Recommendation

If new leaves are pale or your reds stay green, Flourish Iron is the direct fix — paired with good light. For everyday simplicity, a complete all-in-one such as Sunken Garden Green already supplies iron; use the standalone when plants need more. The 500 ml size suits larger or multiple tanks.

Frequently Asked Questions

What is Seachem Flourish Iron for?

It is a concentrated iron supplement that fixes iron deficiency — pale or yellow new leaves — and boosts plant colour.

Why are my plant’s new leaves pale or yellow?

Pale new leaves with green veins are the classic sign of iron deficiency. Dosing iron resolves it.

Does iron make red plants redder?

Iron is central to red pigments, so it helps — but red plants also need strong light to colour up fully.

How often should I dose it?

A few times a week by tank volume, following the Seachem label, or as needed.

Is it a complete fertilizer?

No — it supplies only iron. Pair it with macros and other micros, or use an all-in-one.

Is it safe for fish and shrimp?

At the recommended dose, yes. Dose conservatively in shrimp tanks.

Do I need it if I use an all-in-one?

Usually not — all-in-ones include iron. Use the standalone only if you still see iron deficiency or want richer reds.

Can I overdose iron?

Follow the label — excess iron can encourage algae. Start low and increase only if needed.

250ml or 500ml — which should I buy?

250 ml suits smaller tanks; the 500 ml is better value for larger tanks or regular dosing.

What size is this?

This listing is the 500 ml bottle.

Related Products & Guides

Pair with: Sunken Garden Red, Sunken Garden Green. Smaller size: Flourish Iron 250ml. Collections: Aquarium Fertilizer, Planted Tank Setup. Guides: Iron Fertilizer & Deficiency, Nutrient Deficiency Signs.

Conclusion

Seachem Flourish Iron 500ml is the targeted fix for iron deficiency and the key to vivid colour in planted tanks, in a value size for bigger setups. If new leaves go pale or your reds stay green, this concentrated ferrous-iron supplement restores deep, healthy colour.