Potassium carbonate sesquihydrate (K₂CO₃·1.5H₂O) is a fertilizer-grade, fully water-soluble powder used to raise pH in hydroponic and fertigation systems. Supplying 57% soluble potash (K₂O), it is the preferred dry pH-up agent for professional growers who need precise, repeatable pH correction without introducing agronomically harmful ions.

Why Potassium Carbonate for pH Up?

Unlike sodium-based pH adjusters, potassium carbonate contributes potassium — a primary macronutrient — directly to your nutrient solution. Every dose of pH correction is also a dose of K, making it the most crop-friendly dry pH-up available for recirculating and run-to-waste systems.

Key Specifications

• Chemical Formula: K₂CO₃·1.5H₂O
• Fertilizer Grade: 0-0-57
• Soluble Potash (K₂O): 57%
• Form: Fine white powder
• Solubility: Fully water soluble
• Purity: Fertilizer grade
• Net Weight: 1 lb.

Recommended Uses

• Building pH-up stock concentrates for fertilizer injector systems
• Correcting pH drift in recirculating hydroponic systems
• Aquaponic pH management
• Small-scale and bench-top nutrient solution preparation

Application Notes

• Always add powder slowly to cold water — never add water to powder
• Prepare as a stock concentrate; do not dose dry product directly into the reservoir
• Titrate in small increments and allow system to equilibrate before re-testing
• Wear gloves and eye protection when handling
• Account for potassium contribution in your nutrient balance at high correction volumes

Safety

Mild alkaline irritant. Wear nitrile gloves and safety glasses. Keep dry and store in a sealed container away from moisture. Not classified as hazardous material for shipping.