Add a pH-lowering product designed for your specific material or system
Use diluted acid carefully and in small amounts
Test pH after each adjustment
Increase carbon dioxide in water systems if appropriate
Add organic matter like peat or compost to soil
Use acid-forming fertilizers for soil
Water with rainwater or other naturally softer water
Reduce alkaline additives or contaminants
Mix in acidic materials if compatible
Consult product or system guidelines before adjusting pH