API Water Softener Pillow – Size 5 | Rechargeable GH Reducer for Freshwater Aquariums

API Water Softener Pillow – Size 5 | GH Reducer for Soft Water Aquariums

The API Water Softener Pillow is a ready-to-use filtration pouch designed to reduce general hardness (GH) in freshwater aquariums. It removes calcium, magnesium, and soluble heavy metals such as copper and iron, helping replicate natural soft water conditions found in Amazonian habitats. Ideal for fish species like discus, tetras, and angelfish, as well as breeding and blackwater setups.

Key Features:

• Size 5 – Treats up to 75 liters (20 gallons)
• Reduces GH by removing calcium and magnesium ions
• Also removes copper, iron, and other heavy metals
• Rechargeable up to 4 times using API Aquarium Salt
• Safe for all freshwater fish and plants
• Ideal for breeding tanks and soft water biotopes

Usage Instructions:

• Rinse pouch under tap water before use
• Place in the path of water flow inside the filter
• Effective for up to 48 hours per use
• To recharge: dissolve 3 tbsp of API Aquarium Salt in 7 oz (200 ml) of tap water, soak pouch for 2 hours, then reuse
• Do not allow pillow to dry out between uses

Applications:

Recommended for aquariums with high GH, especially when keeping soft water species or preparing breeding environments. Helps prevent mineral buildup and supports fish health and coloration.