Sera FE Test (Iron)

Iron Test for Fresh and Saltwater — Quick Insight into Iron Deficiency in Aquarium Plants

Sera FE-Test — approx. 75 measurements, also detects chelated iron

✅ Level: Easy — Simple to use. Results within minutes.

Iron (Fe) is an essential nutrient for aquarium plants. Faded or yellow leaves can indicate an iron deficiency. The Sera FE-Test quickly clarifies the iron content in your aquarium — in both fresh and saltwater. It also detects chelated (stabilized) iron, such as that present in Sera Flore 2 Ferro. Sufficient for approx. 75 measurements.

🔧 Product Specifications

🚚 Delivery & Warranty

• Fast delivery from our store — ready to use immediately
• Shipping Tuesday or Friday → Read more about shipping
• Delivery with track & trace, usually within 1–2 business days
• Problem with your order? We will solve it together. Contact us via our customer service.
• Free shipping from €59,-

✂️ Usage Tips

Test the iron level weekly when using plant fertilizer. The ideal iron concentration for aquarium plants is between 0.05 and 0.1 mg/l. In case of a deficiency: dose Sera Florena or Sera Flore 2 Ferro. In case of an excess: perform a partial water change and reduce the dosage.

💡 Tip

Always test before and after dosing plant fertilizer to determine the correct dosage for your aquarium — every aquarium is different.

❓ Frequently Asked Questions

Why do my plants have faded leaves?
Faded or yellow leaves are often a sign of iron deficiency. Use the Sera FE-Test to confirm this and then dose Sera Florena or Flore 2 Ferro.

Can the test also measure chelated iron?
Yes — the Sera FE-Test detects both free iron and chelated (stabilized) iron, such as that present in Sera Flore 2 Ferro.

How often should I test the iron level?
When actively using plant fertilizer, weekly testing is recommended. For stable aquariums, monthly testing is sufficient.

Do you have another question? Feel free to contact us — we are happy to help you make the right choice for your aquarium.