WATER SOFTENER PILLOW
API® WATER SOFTENER PILLOW is ideal for soft water aquariums. These ready-to-use pouches contain resins to remove calcium, magnesium and soluble heavy metal ions, including copper and iron.
Instructions
- Rinse pouch under tap water.
- Place pouch in the path of water flow in the aquarium filter.
- Activity of the pillow lasts 48 hours. After 48 hours, recharging is necessary.
- To recharge: dissolve 3 tbsp. of API AQUARIUM SALT in 7 oz. of tap water. Rinse pouch in tap water, then soak in salt solution for 2 hours.
- Place back in filter.
- When not in use, store pouch in recharging solution; do not let pillow dry out.
- Replace when pillow ceases to function properly after recharging.
| Specification | Value |
|---|---|
| Size | 5 |
| Water Treatment Capacity | 75L |
| Active Duration | 48 hours |
| Removes | Calcium, magnesium, copper, iron |
FAQ
How often should I replace the water softener pillow?
Replace the pillow when it ceases to function properly after recharging.
Can I use the pillow in a freshwater aquarium?
Yes, it is designed for soft water aquariums and helps remove minerals and heavy metals.
What is the recharging process?
Dissolve 3 tbsp. of API AQUARIUM SALT in 7 oz. of tap water. Rinse the pouch in tap water, then soak it in the salt solution for 2 hours before reusing.

Amanda Quinn –
The pillow works well in my 100L aquarium. I’ve used it for two weeks and noticed less mineral buildup in the water. Easy to install and recharging is straightforward. I keep it in solution when not in use.
Hannah Mitchell –
Good for reducing calcium and iron levels. After 48 hours, I recharged it as instructed and it performed well again. A simple solution for maintaining soft water.
Max Dyer –
I’ve used this for several cycles now. The filter flow is smoother and my fish seem more active. The instructions are clear and the product is reliable.