Flourish 50ml

Flourish Potassium is a liquid potassium supplement for planted freshwater tanks where the aquarist already uses a separate fertilizer source. It is intended to correct potassium deficiency without adding a full set of micronutrients, which makes it suitable for keepers who want to adjust macronutrient levels while controlling micronutrient input.

Why it matters

• It is formulated to be used together with other fertilizers that supply macro- and micronutrients, so the aquarist can address one specific deficit without stacking overlapping elements.
• Potassium is the main active component, at 0.37% soluble potassium carbonate, which is the element the product is designed to replenish.
• The cap is notched in 1 ml steps, so the 5 ml full dose and smaller partial doses can be measured directly from the bottle.
• The manufacturer recommends refrigerating the bottle after opening. This is advised rather than required.

Specifications

• Bottle volume: 50 ml
• Dose: one cap (5 ml) per 250 l of water
• Dosing frequency: once or twice a week
• Total nitrogen (N): 0.07%
• Available phosphorus (P2O5): 0.01%
• Potassium (soluble potassium carbonate): 0.37%
• Sulfur (S): 0.2773%
• Calcium (Ca): 0.14%
• Magnesium (Mg): 0.11%
• Sodium (Na): 0.13%
• Chlorine (Cl): 1.15%
• Iron (Fe): 0.32%
• Manganese (Mn): 0.0118%
• Boron (B): 0.009%
• Molybdenum (Mo): 0.009%
• Zinc (Zn): 0.0007%
• Cobalt (Co): 0.0004%
• Copper (Cu): 0.0001%
• Packaged weight: 0.06 kg
• EAN: 000116051408

What it works with

This product belongs to the planted freshwater category, under CO2 and fertilization for aquariums. It is meant for dosing alongside other fertilizers that cover the rest of the macro- and micronutrient needs, and the manufacturer specifically points to the Flourish Nitrogen and Flourish Phosphorus products for the remaining macronutrients. The per-volume dose of 5 ml per 250 l makes it straightforward to scale to the size of the tank.