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Seachem Flourish is a liquid micronutrient supplement for freshwater planted tanks. It supplies trace elements such as iron, calcium and magnesium rather than the macronutrients nitrogen, phosphorus and potassium, which Seachem sells separately as Flourish Nitrogen, Phosphorus and Potassium. It suits planted-tank keepers who already dose macros and want a broad trace-element top-up, and it is stated safe for shrimp and other invertebrates. Against all-in-one liquids it is narrower by design, so tanks with heavy feeding or high light usually need the NPK bottles alongside it.
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Lowest price we've seen: $6.60 on Nov 13 at Herbspro. Tracked across 12 stores since Nov 13.
Planted-tank keepers generally rate Flourish as a reliable trace-element supplement that keeps leaves looking healthy when macros are dosed separately. The common complaint is that it is not a standalone fertilizer and that dosing needs care to avoid algae.
Flourish is a plant supplement for natural freshwater aquariums. It contains a rich assortment of micro elements, trace elements and other nutrients, including calcium, magnesium and iron. These are elements that have been shown to benefit aquatic plants.
Flourish does not supply the macro elements (NPK). For nitrogen, phosphorus or potassium, use Flourish Nitrogen, Flourish Phosphorus or Flourish Potassium as needed. Flourish is safe for invertebrates such as shrimp.
