API Proper pH 6.5 240G
Create the ideal environment for sensitive freshwater fish with API Proper pH 6.5, a powerful aquarium water treatment that automatically sets and stabilises pH at 6.5. Perfect for species that thrive in slightly acidic water, this formula helps support the health of Tetras, Discus, and Angelfish.
In addition to precise pH control, this multi-benefit conditioner removes chlorine and detoxifies heavy metals, making tap water safer for your aquarium. Added electrolytes help reduce fish stress, supporting overall well-being during water changes or tank setup.
Use during new aquarium setup or when performing routine water changes to maintain stable, fish-friendly conditions.
Key Features
- Automatically sets and stabilizes aquarium pH to 6.5
- Removes chlorine and detoxifies heavy metals
- Reduces fish stress with added electrolytes
- Safe for use during water changes and tank setup
| Specification | Value |
|---|---|
| Product Type | Water Conditioner |
| Target pH | 6.5 |
| Weight | 240g |
| Usage | Tap water treatment, new tank setup, routine water changes |
FAQ
Can I use API Proper pH 6.5 for both new tank setup and regular water changes?
Yes, API Proper pH 6.5 is suitable for both new aquarium setup and routine water changes to maintain stable pH levels.
Does this product affect other water parameters like ammonia or nitrite?
No, API Proper pH 6.5 specifically targets pH adjustment, chlorine removal, and heavy metal detoxification. It does not alter ammonia or nitrite levels.
Is the pH level maintained after adding the conditioner?
Yes, the product automatically sets and stabilizes pH at 6.5, helping to maintain consistent conditions in the aquarium.

Neil Bower –
I’ve used this product for my Discus tank, and the pH has stayed stable at 6.5 without fluctuations. The water feels safer after treatment, and my fish seem more active. Great for sensitive species.
Boris Lyman –
Works well during water changes. My Angelfish haven’t shown any stress signs since I started using it. The chlorine removal is effective and the pH remains steady.
Phil Butler –
Set up a new tank with this conditioner and it made the transition smooth. The pH stabilized quickly, and my Tetras adapted well. No fish deaths or stress observed.
Jacob Reid –
Used it during a water change and noticed the water felt cleaner. The pH stayed at 6.5 for several days. Good value for the results.