Seachem Flourish Potassium
Seachem Flourish Potassium is a concentrated potassium supplement designed specifically for freshwater planted aquariums. Potassium (K) is one of the essential macronutrients required by aquatic plants for various biological processes, including photosynthesis, enzyme activation, and nutrient transportation. It is especially important in environments where potassium levels may be depleted by water changes, heavy plant growth, or the use of reverse osmosis (RO) water, which tends to be low in potassium.
Key Features:
- Essential Nutrient: Potassium is vital for many metabolic processes in plants. It helps with protein synthesis, strengthens the plant’s ability to transport water and nutrients, and plays a role in improving plant health and resistance to stress.
- Targets Yellowing Leaves: Helps correct yellowing of leaves, pinholes in older leaves, and overall weak plant growth.
- Easy to Use: Simply add one drop per 10 liters of water according to the dosage instructions.
- Safe for Plants and Fish: Formulated to be safe for both aquatic plants and fish.
| Specification | Value |
|---|---|
| Form | Clear liquid |
| Volume | 50 ml |
| Concentration | 1000 ppm potassium |
| Recommended Dosage | 1 drop per 10 liters of water, weekly |
FAQ
How often should I use Seachem Flourish Potassium?
It is recommended to use one drop per 10 liters of water once a week to maintain adequate potassium levels in your aquarium.
Can I use this product with other plant supplements?
Yes, Seachem Flourish Potassium can be used alongside other Seachem Flourish products such as Nitrogen and Phosphorus supplements for balanced plant nutrition.
Is this product safe for fish?
Yes, Seachem Flourish Potassium is formulated to be safe for fish and does not harm aquatic life when used as directed.

Colin Forsyth –
After using Seachem Flourish Potassium for three weeks, my anubias and java fern showed better color and less yellowing. The leaves are fuller and more vibrant. I added one drop per 10 liters weekly and noticed improvement within a week.
Robert Terry –
My aquarium had several older leaves with pinholes and yellow edges. After using this supplement regularly, the yellowing reduced and new growth appeared. It’s simple to use and effective without affecting my fish.
Wendy Avery –
I’ve tried several potassium products before, but this one works best. My plant growth has improved significantly, especially in the middle and lower areas of the tank. I now use it weekly as recommended.