API pH Down Freshwater Aquarium Water Treatment 1.25-oz
API pH Down Freshwater Aquarium Water Treatment 1.25-oz








API pH Down Freshwater Aquarium Water Treatment 1.25-oz
API pH Down Freshwater Aquarium Water Treatment 1.25-oz
Key Benefits
- Gradually lowers pH safely for fish
- Maintains stable and balanced water pH
- Keeps water clear with no cloudiness
- Free from phosphates and nitrates
- Fast-acting and easy to use solution

Free Shipping*
On orders over $49

30-Days Free Returns*
Eligible items only
Frequently Bought Together
Frequently Bought Together
Description
Description
The API pH Down Freshwater Aquarium Water Treatment is easily one of the top solutions in our aquarium fish supplies category to optimize water conditions in freshwater aquariums. As a well-trusted product from API for aquariums, the water treatment will safely lower and stabilise pH in aquariums with excess alkalinity. Thus creating the ideal environment for fish and plants. The primary benefit of this product is the safe range of pH for fish health.
Moreover, API® pH DOWN is a pH adjuster that lowers high pH levels in freshwater aquariums, making the water more acidic when it rises above neutral (7.0), which is important since pH affects fish and plant health and should be tested regularly.
Key Benefits:
- Safe pH Reduction: Gradually lowers high pH to suitable levels for aquatic life.
- Water Stability: Maintains consistent pH to prevent harmful fluctuations.
- Clear Water: Prevents cloudiness, keeping the aquarium visually pristine.
- Algae Prevention: Phosphate- and nitrate-free to avoid algae proliferation.
- Fast-acting formula: For quick pH adjustments
- Ease of Use: Colorless solution that won't cloud aquarium water and safe for freshwater aquariums.
- Chemical-free: Phosphate-free and nitrate-free, helping prevent algae growth
Ingredients & Analysis
Ingredients & Analysis
Sulfuric acid < 10%
Attributes OR Specification
Attributes OR Specification
Liquid pH adjuster
Lowers pH in freshwater aquariums
Colorless
Does not cloud water
Does not promote algae (phosphate/nitrate free)
Safe for fish and plants when used as directed
safety and precautions
safety and precautions
- Sudden large pH changes can be fatal to fish.
- Some species are sensitive to pH changes; make adjustments slowly.
- Avoid contact with skin and eyes. If contact occurs, rinse thoroughly with water.
- Keep out of reach of children and pets. Store in a cool, dry place.
- Consider wearing gloves when handling, due to the presence of sulfuric acid.
- Safe for freshwater aquariums.
Direction
Direction
- Use an API pH Test Kit to determine the current pH level of your aquarium water.
- Add 1 ml for each 10 gallons of aquarium water.
- After adding, wait, then retest pH before adding another dose.
- Do not change pH by more than 0.2 units in a 24-hour period to avoid stressing fish.
- Continue to monitor and adjust as necessary, always retesting before each addition.





