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🎁 Free Standard Shipping
Enjoy FREE standard shipping on all orders over ₱10,000!
Applicable to Metro Manila buyers only.
⚡ Same-Day Delivery
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You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Seachem Flourish Potassium is a highly concentrated potassium (K) supplement formulated for freshwater planted aquariums. It supplies 50,000 mg/L of potassium, making it ideal for tanks with heavy plant loads, low K in tap or RO/DI water, or where potassium is rapidly consumed. As one of the three primary macronutrients (N-P-K), potassium plays a vital role in photosynthesis, protein synthesis, and enzyme activation, helping ensure robust plant growth and healthy leaf structure.
Key Features
🧪 Usage Instructions
Initial Setup (Establishing potassium levels):
Maintenance Dosing (Regular use):
Frequently Asked Questions (FAQ)
Q: How do I know if my tank needs more potassium?
A: Common signs include yellowing or transparent older leaves, pinholes, or leaf curling—especially in fast growers.
Q: Will Flourish Potassium cause algae?
A: No, potassium does not directly promote algae. In fact, nutrient balance helps plants outcompete algae.
Q: Is it safe for shrimp and other invertebrates?
A: Yes, Flourish Potassium is completely safe when used as directed.
Q: Can I use this in tanks with CO₂ injection?
A: Absolutely. CO₂-injected tanks usually have higher nutrient demands, making K supplementation even more important.
Q: What’s the ideal potassium level in a planted tank?
A: Target 10–30 ppm for optimal growth in medium to heavily planted aquariums.
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
ShippingWe can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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