Seachem Flourish Potassium

Seachem Flourish Potassium

Seachem Flourish Potassium is a highly concentrated potassium supplement for planted aquariums, designed for aquarists maintaining naturally planted tanks and rapidly growing aquatic plants. With 50,000 mg/L of potassium, it helps address potassium depletion without adding nitrate or phosphate to the aquarium.

Key Benefits

• Provides 50,000 mg/L of potassium for planted aquariums.
• Helps maintain potassium levels where source water has low mineral content or plant growth is rapid.
• Allows potassium adjustment without affecting nitrogen or phosphorus levels.
• Derived from potassium sulphate rather than potassium nitrate or potassium phosphate.
• Can be used alongside Seachem Flourish Nitrogen and Seachem Flourish Phosphorus when managing an individual NPK ratio.

Suitable For

Suitable for freshwater planted aquariums, particularly systems where potassium may become a limiting factor for plant growth. Signs associated with potassium deficiency in older leaves may include chlorosis (yellowing), necrosis (death/browning), and weak stems and roots.

Dosage

Use 1 capful (5 mL) for every 125 L (30 gallons). This dose raises potassium by 2 mg/L. Repeat 2–3 times per week, or as needed in response to signs of potassium deficiency in older leaves.

Compatibility

Seachem Flourish Potassium does not contain phosphate or nitrate, making it suitable for use with Seachem Flourish Nitrogen and Seachem Flourish Phosphorus.

Frequently Asked Questions

What does Seachem Flourish Potassium add to a planted aquarium?
It adds potassium at a concentration of 50,000 mg/L, an important element for maintaining vigorous aquatic plant growth.

Does Flourish Potassium contain nitrate or phosphate?
No. It does not contain nitrate or phosphate, allowing potassium levels to be adjusted without changing nitrogen or phosphorus.

How much Seachem Flourish Potassium should I dose?
Dose 1 capful (5 mL) per 125 L (30 gallons) of aquarium water. This raises potassium by 2 mg/L.

How often should I use this potassium supplement?
Use it 2–3 times per week, or as needed when older plant leaves show signs linked to potassium depletion.

What are signs that aquarium plants may need potassium?
Older leaves may show chlorosis or yellowing, necrosis or browning, and plants may develop weak stems and roots.

Can I use it with Seachem Flourish Nitrogen and Flourish Phosphorus?
Yes. Its phosphate- and nitrate-free formulation makes it suitable for use with Seachem Flourish Nitrogen and Seachem Flourish Phosphorus.

When can I expect delivery?

• Gauteng (Jhb/Pta) - 1-3 working days
• Nationwide (Cpt/Dbn+) - 2-5 working days
• Outlying Areas - 3-7 working days

All orders are sent via Economy Road, typically through Fastway or Internet Express Couriers*. Estimated timeframes are not guaranteed. Once the order is collected by the courier, we have no control over third-party logistics and cannot make any time promises.

If you prefer a faster 🚀 shipping option, we also offer The Courier Guy during checkout in the dropdown selection. Please note that this option is not free, and you must choose it to use it. Please pay careful attention to the cutoff times and delivery timeframe for these options during checkout.

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Delivery times to lockers and pickup locations typically range from 2–7 working days, depending on your location.*

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Collection timeframes:

• Bob Box: Collect within 2 days of receiving your collection notification.
• PUDO Lockers: Collect within 36 hours of receiving your collection PIN or SMS notification.

If a PUDO parcel is not collected within 36 hours, it will automatically be transferred to the nearest PUDO Kiosk or Depot at no additional cost. The parcel will then be held there for approximately 2 days before being returned.

Please ensure you collect your parcel within the applicable collection period. Uncollected parcels will be returned to the sender, and additional shipping charges may apply should the order need to be resent.