Description
API pH Down – pH Reducer for Freshwater Aquariums
API pH Down is a liquid pH adjuster designed to safely lower the pH in freshwater aquariums by neutralising carbonate hardness. Maintaining the correct pH improves fish health, colouration, breeding, and resistance to disease.
Ideal for aquariums containing a mix of fish species, this phosphate-free formula is safe for live plants and helps create stable, healthy conditions for your aquatic life.
✅ Gently lowers pH in freshwater tanks
✅ Neutralises carbonate hardness
✅ Improves fish health and colour
✅ Safe for live plants
✅ Contains no phosphates
✅ Available in 120ml and 480ml sizes
Ideal pH ranges for common fish species:
• Community aquariums: 7.0
• Livebearers (mollies, swordtails): 7.0–7.2
• Acid-loving fish (angelfish, neon tetras): 6.5–6.8
Usage Tips:
• Do not lower pH by more than 0.2 units in 24 hours if fish are present
• Multiple treatments may be needed for tanks with high carbonate hardness
• Monitor pH regularly with a reliable test kit
A safe and effective solution for adjusting and maintaining ideal water conditions in your freshwater aquarium.