Seachem Flourish vs. Easy Green: Supplement vs. Solution

In the world of planted aquaria, the single biggest point of confusion for beginners is the difference between "nutrients" and "trace elements." This confusion is perfectly highlighted by the comparison of Seachem Flourish and Aquarium Co-Op’s Easy Green.

On the surface, both are liquids that make plants grow. But chemically, they are doing two completely different jobs. One is a targeted micro-nutrient supplement, while the other is a comprehensive, all-in-one diet.

Let's dive into why using one instead of the other can lead to either a thriving jungle or a tank full of melting plants and algae.

1. The N-P-K Gap: The "Big Three"

Plants need three major nutrients in large quantities: Nitrogen (N), Phosphorus (P), and Potassium (K). These are known as Macros.

• Easy Green is a true All-in-One. It contains a significant amount of Nitrogen and Potassium. It assumes your tank is hungry and needs everything to grow.
• Seachem Flourish contains almost no Nitrogen or Phosphorus. Why? Because Seachem designs its products with the "Low Tech" philosophy—assuming that your fish waste and uneaten food will provide the Nitrogen and Phosphorus, and you only need Flourish to provide the minerals (Micros) that fish food lacks.

2. Targeted Control vs. Convenience

Seachem Flourish is part of a "split" dosing system. If you use Flourish, Seachem expects you to also buy Flourish Nitrogen, Flourish Phosphorus, and Flourish Potassium as separate bottles. This allows professional scapers to adjust individual levels based on water tests.

Easy Green is a "one-bottle solution." It is designed for convenience. If you want to grow plants without becoming a chemist, Easy Green provides a balanced ratio of everything in a single pump. This makes it much harder to mess up, but gives you less control if you have a specific deficiency (like a Potassium-only lack).

3. Concentration and Dosing Math

Seachem Flourish is incredibly concentrated (5ml per 60 gallons). It lasts a very long time but requires careful measurement. Easy Green is designed around the "1 pump per 10 gallons" rule. While the pump is convenient, you go through more volume of liquid than you do with Flourish.

4. The Algae Risk Factor

Because Easy Green is rich in Nitrogen and Phosphorus, overdosing it in a tank with low plant mass or low light is a recipe for hair algae or green water. Seachem Flourish, by contrast, is much harder to "trigger" an algae bloom with because it lacks the primary fuel source (Nitrates) that algae needs to explode. If you are struggling with an existing algae outbreak, switching to Flourish while you find the balance is a common "reset" strategy.

5. Livestock & Shrimp Safety

Both products are generally safe for invertebrates when used as directed. However, Seachem Flourish has one of the lowest copper concentrations on the market (0.0001%), making it the gold standard for dedicated Neocaridina and Caridina shrimp breeders. Easy Green is also documented to be shrimp-safe at recommended doses, but because it encourages faster plant growth, it provides a secondary benefit by creating more grazing surfaces (biofilm) for your shrimp to feed on.

6. Identifying Deficiencies

• New Leaves are Pale/White: This is often an Iron or Trace deficiency. Seachem Flourish is the more surgical fix for this specific issue.
• Older Leaves are Yellowing: This is a classic Nitrogen deficiency. You need the macro-nutrients provided in Easy Green.
• Tiny Puncture Holes in Leaves: This indicates a Potassium deficiency. While both contain Potassium, Easy Green provides it in significantly higher quantities.

Summary: The Verdict

Choose Seachem Flourish if: You have a low-tech tank with lots of fish (high bio-load), you prefer to dose your macros separately, or you want a pure micro-nutrient supplement.

Choose Easy Green if: You want a lush planted tank with minimal effort, you have few fish or lots of fast-growing plants that "eat" nitrates, or you want the convenience of a pump-bottle system.

Written by Richard James

Aquarist, author, and creator of ShrimpKeeper.co.uk. Helping hobbyists achieve professional results through precision dosing.

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