Arm & Hammer DCAD Plus 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. The 50 lb. size is ideal for large commercial greenhouse and fertigation operations.

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

• Brand: Arm & Hammer DCAD Plus
• 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: 50 lb.

Recommended Uses

• Building pH-up stock concentrates for fertilizer injector systems
• Correcting pH drift in large recirculating hydroponic systems
• Aquaponic pH management
• Large-scale commercial greenhouse and fertigation operations

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.