Flourish Potassium contains 50,000 mg/L of potassium suitable for the natural planted aquarium. Potassium is one of several elements that are vitally important to maintaining a vigorous level of growth in a planted aquarium.

Potassium can become depleted in a rapidly growing system or when the source water has a low mineral content. In these cases potassium could become the limiting factor to growth. Use Flourish Potassium to prevent potassium depletion (signs of which include yellowing in older leaves) and maintain the highest level of growth.

The most easily obtained sources of potassium are potassium nitrate and potassium phosphate. Both of these sources add to either nitrogen or phosphorus as well as potassium, making it virtually impossible to target a specific NPK ratio. Flourish Potassium is derived from potassium sulfate, allowing the user to adjust potassium levels without affecting nitrogen or phosphorus.

Directions: 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 which includes: chlorosis (yellowing), necrosis (death/browning), and weak stems and roots.

Derived from: Potassium Sulfate. Elemental potassium is present at a concentration of 50,000 ppm (e.g. 5%). Archaic fertilizer laws require us to list potassium in terms of equivalence to a material that is not present (K2O) rather than the more scientifically sound method of simple elemental equivalence.

FREE SHIPPING OVER $119!*

- does not apply to livestock -

$11.99 FLAT RATE FOR LESS THAN $119.00 - CANADA WIDE!

*EXCEPTIONS:

• Any heavy or bulky items will incur a 100% charge of the actual shipping cost (valid for both Canada and the US). Heavy bulky items include (but are not limited to): salt, dry rock, sand, chillers, sumps, aquariums, stands, and some filter media.
• Frozen or perishable food can only be shipped via UPS Express. We have discounted the express shipping of these items to help the hobbyist out.
• Livestock is covered by a different shipping policy. To view the policy and further information regarding shipping livestock, click here.

GENERAL NOTES:

• We always make our best effort to ship your order via the carrier chosen during the check-out process; however, for some multi-piece shipments and/or remote destinations, we must reserve the right to use another carrier at our discretion (and without prior notice). If you require notice of any changes made to the carrier, please mention it in the special instructions during check-out.
• Upon request, we will ship your dry goods as per your specifications (courier, airlines, on your account, etc.).
• Quoted rates are the carriers live discounted shipping rates after adjusting for any/all shipping promotions.

Return Policy — Aquarium Equipment & Supplies

• All returns and/or exchanges must be made within 30 days of receipt of product.
• Before returning or exchanging any goods, you must contact J&L Aquatics to obtain a Return Merchandise Authorization (RMA). Items returned without prior authorization will be declined.
• Returned items must be unused, in original packaging, in as-new condition, and in perfect sellable condition. All returns are subject to inspection upon receipt.
• A 15% restocking fee applies to all online returns. This fee includes the cost of outbound shipping.
• Customer is responsible for return shipping costs on standard returns.
• Order cancellations made before shipping are not subject to a restocking fee.

Non-Returnable Items

• Special order items
• Clearance / final sale items
• Open box items

Regular sale items (non-clearance) are returnable within the 30-day return window, subject to our standard return conditions.

Defective, Warranty & DOA Items

• If you receive an item that is defective, not working, or dead on arrival (DOA), please contact us as soon as possible.
• Confirmed defective and warranty returns have no restocking fee and no Affirm fee. Customer does not pay return shipping — J&L Aquatics will provide a prepaid return label.
• All defective claims are subject to inspection. Items showing signs of customer damage, improper installation, or misuse are not covered under warranty.

Carrier Damage & Lost in Transit

• If your order arrives damaged by the carrier or is lost in transit, please contact us right away with:Photos of the damaged product (if applicable)Photos of the damaged box/packaging (if applicable)A description of the issue
• Important — Do not throw out any packaging! Please keep all original packaging, boxes, and packing materials. These are required to process your claim. Discarding packaging may affect our ability to resolve your claim.

High-Value Items ($100+)

• For items valued at $100 or more, customers must provide a return tracking number before a replacement will be shipped.

Affirm & Financing Orders

• Affirm or similar financing orders that are cancelled or returned in-store are subject to a 5% service charge. This covers the processing fee charged to us by the financing provider.
• The Affirm service charge does not apply to confirmed defective or warranty returns.