API Aquarium Pharmaceuticals pH Control Kit - 30B pH Down 16 oz & pH UP 4 oz Freshwater Aquarium Water pH Adjuster

★★★★★ 4.1 65 reviews

$21.47
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$21.47
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Free shipping Free 30-day returns

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Product details

Management number 217929135 Release Date 2026/05/03 List Price $8.59 Model Number 217929135
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The API pH Adjusting Solutions Bundle includes a 16 oz bottle of pH Down to lower aquarium water pH and a 4 oz bottle of pH UP to raise aquarium water pH. These two complementary products work together to provide full control over freshwater aquarium water acidity. pH is critical for fish health, with levels between 6.5-7.5 being optimal for most community tropical fish. Water pH naturally fluctuates over time due to fish waste, uneaten food, and tap water changes. Frequent testing and adjustment is needed to maintain a steady pH. This bundle contains pH solutions specially formulated to be safe for fish, plants, and aquariums. The pH Down uses a phosphate-free formula to slowly bring down pH levels. The pH UP also has a phosphate-free formula to gradually neutralize acidic water substances. With this bundle, you can precisely fine-tune your aquarium water pH as needed for healthy fish and clear water, without worrying about safety. Simply follow the directions to dose the aquarium and check pH weekly. Made by API with over 50 years of aquarium experience, these solutions are designed to work together to control pH drift.

  • Lowers pH levels in freshwater aquariums with a 16 oz bottle of API pH Down to help fish thrive.
  • Raises pH levels in freshwater tanks with a 4 oz bottle of phosphate-free API pH Up to promote fish health.
  • Both pH adjuster solutions are safe for use with fish, plants and can be used when setting up a new aquarium.
  • Weekly pH testing is recommended to maintain ideal freshwater aquarium water acidity for your fish.
  • Over 50 years of API aquarium research and products for easy fishkeeping and water quality maintenance.
Item Form Liquid
Brand Name API
Manufacturer API
Liquid Volume 16 Fluid Ounces
Target Species Fish

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