Seachem Flourish Comprehensive (500 mL)
$10.52
The classic trace supplement — not a complete fertiliser. Flourish is micros and trace elements only, so it is best paired with a nitrogen phosphorus potassium source rather than run alone.
Pros
- A rich blend of trace elements and micronutrients including chelated iron
- Gentle and low phosphate, so it is balanced and shrimp safe with no algae bloom
- Cheap, widely available, and a long-time hobby staple for topping up micros
- Dilutable, with a measured cap for easy dosing on a light planted tank
Cons
- Micros only — it lacks nitrogen and potassium, so plants in a lean tank still starve without a macro source
- As a supplement it does little run alone; it assumes another fertiliser supplies the macros
Score breakdown
Specifications
| NPK | None (micros only) |
|---|---|
| Micronutrients | Full trace blend |
| Iron Content | Chelated iron |
| Formulation | Trace/micro liquid |
| Dose Rate | 5 mL per 60 gal |
| Dispenser | Measured cap |
| Frequency | 2x weekly |
| Phosphate | Very low |
| Invertebrate Safe | Yes (shrimp safe) |
Alternatives
$28.99 · 90 / 100A
The best all-in-one for a low-tech planted tank: a complete formula with macro and micro nutrients dosed from a pump dispenser. One weekly dose covers nitrogen phosphorus potassium plus chelated iron and trace elements.
$23.94 · 91 / 100A
The premium root tab: a complete formula of over 15 nutrients including nitrogen phosphorus potassium, chelated iron and trace elements, tucked into the substrate for heavy root feeders like swords and crypts.
$17.85 · 82 / 100A−
Complete root tabs at a value price: slow-release nitrogen phosphorus potassium plus micros, shrimp safe. A cheaper, EI-style alternative to Seachem's tabs for heavy root feeders.
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