Description
GREEN BRIGHTY NEUTRAL K is a liquid fertilizer for supplying potassium to a planted aquarium. When potassium is insufficient, the photosynthesis activity and growth of aquatic plants are affected and this can cause yellowing and bleaching of leaves as well as lower resistance to algae. Daily application of GREEN BRIGHTY NEUTRAL K to the aquarium eliminates these problems caused by potassium deficiency and promotes growth of aquatic plants. This product does not cause a rise in pH and carbonate hardness (KH). It is ideal for supplying potassium to aquatic plants that do not prefer high pH and KH environments.
Dosing Potassium Safely With ADA Green Brighty Neutral K
ADA Green Brighty Neutral K is the potassium supplement we recommend when leaves show yellowing, bleaching or pinholes despite otherwise good care. Short potassium hampers photosynthesis and growth, and lowers a plant’s resistance to algae. Its standout feature is in the name: it supplies potassium without raising pH or carbonate hardness, so you can dose freely without nudging your water chemistry upward.
That neutral profile suits Singapore well, where our soft, slightly acidic tap water already sits low in KH and pH, exactly the conditions many prized stem plants and shrimp prefer. Adding potassium without shifting those parameters lets you keep a stable, acidic environment while still feeding demand. We find a steady daily dose the simplest way to keep potassium from becoming the limiting nutrient.
It is part of the ADA Green Brighty line in our conditioners & medication range. See our potassium dosing and CO2, pH and KH guides to dose with confidence.

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