Seachem Flourish Phosphorus - 250mL
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Product Information
Full details
Seachem Flourish Phosphorus is a specialized liquid supplement designed for serious aquarists looking to optimize plant growth by addressing macro-nutrient deficiencies. It is ideal for planted aquarium hobbyists who need precise control over their phosphate levels without the unwanted addition of nitrates. While it provides essential nutrition to boost plant development, users must exercise caution and test their aquarium water regularly to ensure they do not exceed the recommended concentration range, which could lead to nutrient imbalances.
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| Brand | Seachem |
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Extended Product Information
FAQs
Does this product contain nitrates?
No, Seachem Flourish Phosphorus is strictly nitrate-free.
Can I use this with shrimp in my tank?
Yes, the product is completely safe for invertebrates, including shrimp.
How often should I test my water?
It is recommended to test your phosphate levels at least once a week, particularly after you have dosed the tank.
What is the ideal phosphate level for my aquarium?
The ideal range is generally between 0.15 and 1.0 mg/L.
Can I overdose the tank with this product?
Yes. Exceeding the recommended dosage can lead to water quality issues and potentially trigger unwanted algae blooms.
Do I need to turn off my UV sterilizer when dosing?
It is not required, as the product is a stable chemical solution and will not be degraded by standard UV aquarium sterilizers.
Troubleshooting
Phosphate levels remain too high after dosing.
Cease supplementation and perform a partial water change. Ensure your current fish population is not contributing excessive phosphates through waste.
Increased algae growth noted after using the product.
This often indicates an imbalance. Verify that your phosphate levels are within the 0.15–1.0 mg/L range and adjust dosing frequency accordingly.
Plants are still not showing growth improvement.
Phosphorus may not be the limiting factor. Check for adequate lighting, CO2, and other macro-nutrients like nitrogen and potassium.
Pros and Cons
Pros
- Allows for targeted dosing without unwanted nitrate spikes
- Highly effective for correcting signs of phosphorus deficiency
- Safe for sensitive shrimp and invertebrate species
- Simple liquid format ensures easy measuring and dispersion
Cons
- Requires regular water testing to avoid over-dosing
- Must be part of a larger nutrient regimen for maximum efficacy
- Improper use may lead to uncontrolled algae growth if levels are too high
Setup, Compatibility & Care
To begin using the product, ensure your aquarium has a functioning test kit capable of measuring phosphate levels. The standard dosage is 2.5mL per 80L of water, applied once or twice per week. Store the bottle in a cool, dark place away from direct sunlight to maintain the potency of the solution. Keep the cap tightly closed when not in use to prevent evaporation or contamination. This supplement is compatible with most freshwater planted aquarium fertilizers, including the broader Seachem Flourish line, but should be used sparingly if you already have a high fish-to-plant ratio, as fish waste often contributes naturally occurring phosphorus.