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Info: Seachem Flourish Potassium™ Dosing Instructions

Use 1 capful (5 mL) for every 125 L (30 US 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 include: chlorosis (yellowing), necrosis (death/browning), pinholes in leaves, and weak stems and roots.

Flourish Potassium™ Dosing Table

The following dosing tables provide the standard dose of Flourish Potassium™ for various water volumes.  These dosing instructions apply to the 100 mL - 500 mL bottles. Please note that the 2L and 4L bottles of Flourish Potassium™ have larger cap volumes than the smaller bottles.  This dose will increase the potassium by 2 mg/L.

Water Volume Dose in mL Dose in caps Dose in drops
1 quart (1 L) 0.04 mL 1/120 Capful 0.8 Drops
1 gallon (4 L) 0.16 mL 1/30 Capful 3.3 Drops
5 gallons (20 L) 0.83 mL 1/6 Capful 16 Drops
10 gallons (40 L) 1.7 mL 1/3 Capful 32 Drops
20 gallons (80 L) 3.4 mL 2/3 Capful 66 Drops
30 gallons (125 L) 5 mL 1 Capful 100 Drops
50 gallons (200 L) 8.5 mL 1 2/3 Capful 166 Drops
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