API pH Down, 16 OZ

Professional Water Chemistry Control

Maintaining the correct pH is the difference between a fish that is "surviving" and a fish that is "thriving." Many tropical species—such as Angelfish, Discus, and Tetras—require acidic conditions to display their best colors and health. API pH Down offers a concentrated, reliable way to decrease pH levels safely and effectively in large freshwater systems.

Advanced Formula for Superior Results:

• Algae-Safe (Phosphate-Free): Many pH reducers use phosphate-based buffers, which can lead to explosive algae growth. API pH Down is 100% phosphate-free, allowing you to lower your pH without the side effect of "green water" or hair algae.

• Rapid Distribution: The liquid formula disperses instantly throughout the water column, ensuring there are no "acid pockets" that could harm your fish.

• Large Tank Value: This 16 oz bottle is built for the serious hobbyist, capable of treating over 4,700 gallons (17,791 L) of aquarium water.

• Safe for Livestock & Plants: When used as directed, it is completely safe for freshwater fish, invertebrates, and live plants.

• Consistency & Precision: Designed for incremental adjustments, giving you total control over the environment of sensitive species.

Why pH Stability Matters:

A high pH can cause "Ammonia Toxicity," making even small amounts of waste more lethal to your fish. By bringing your pH into the ideal range (usually 6.5 to 7.5 for community tanks), you reduce stress and improve the efficacy of your fish’s natural immune system.

How to Use Safely:

1. Test: Determine your current pH using an API pH Test Kit.

2. Calculate: Add 2.5 ml (1/2 tsp) for every 50 gallons (190 L) of water.

3. Circulate: Allow the filter to run for several hours to ensure a uniform mix.

4. Monitor: Re-test before adding more. Pro-Tip: To avoid "pH Shock," never lower your pH by more than 0.2 units per day while fish are in the tank.