pH Decrease (Freshwater)

///pH Decrease (Freshwater)

pH Decrease (Freshwater)


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Safely lowers pH levels

When used as directed:

  • Safely lowers pH levels
  • Is not harmful to aquatic life and plants
  • May cause some brief cloudiness depending on water quality


  • Two pH adjusters for buffered effectiveness
  • Three electrolytes to help maintain osmotic balance
  • One slime coat ingredient for skin protection and stress reduction

Note: With all pH adjusting products, the alkalinity level (water hardness) should be adjusted to a normal range (100-200 ppm) before any effective and stable pH adjustment can be made.

Make recommended application in several steps to avoid over-adjustment and pH bounce.

Available Sizes

  • 4 fl. oz. (118 mL.) (PHDEF04)
  • 8 fl. oz. (236 mL.) (PHDEF08)
  • 16 fl. oz. (473 mL.) (PHDEF16)
  • 1 gal. (3.785 L.) (PHDEFG1)
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  • Test pond water the same time each day (dawn=lowest pH; dusk=highest pH) for a pH reading above 8.5.
  • Most ponds targe a 7.5 pH with an alkalinity level between 100-200 ppm (normal range).
  • Add 1 oz. per 375 gallons for pond water for every 1.0 pH unit change desired.
  • Apply in several steps and measure change in the pH before next addition.
  • If your pond contains fish and/or plants, do no dramatically change your pH levels more than 0.5 pH unit in a 24 hour period, as not to shock aquatic life and/or fish.

Additional information


4 oz (PHDEF04), 8 oz (PHDEF08), 16 oz (PHDEF16), 64 oz (PHDEF64)