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API API pH Down Aquarium pH Adjuster
API [11442-502588]

API pH Down Aquarium pH Adjuster

Free Shipping at $75

Aquarium Pharmaceuticals pH Down lowers pH and makes aquariums more acidic. Fast-acting, colorless and easy-to-use. API pH Down is fast acting, colorless, easy to use and will not cloud or color aquarium water.

  • Lowers pH for freshwater aquariums
  • For community aquariums, soft water & live-bearing fish
  • Will not cloud or color aquarium water


The colorless formula will not cloud or color aquarium water. Contains no phosphates, a major source of algae outbreaks.

The following pH levels are recommended for freshwater tropical fish:
Egg-laying fish: 6.6 to 6.8 (slightly acidic)
Community aquarium: 7.0 (neutral)
Live bearing fish: 7.2 to 7.6 (slightly alkaline)

Directions For Use: Use API Freshwater pH Test Kit to determine the pH of aquarium water.To lower pH, add two drops of pH Down for each gallon of aquarium water.Take another pH reading before adding the next dose of pH Down.If fish are present in the aquarium, do not change the pH more than 0.2 in any 24 hour period (for example, from 7.2 to 7.0).

In case of contact with eyes, rinse immediately with plenty of water and seek medical attention. If on skin, flush with water for 15 minutes. Remove contaminated clothing. In case of accident or if you feel unwell, seek medical advice immediately (show label where possible). If swallowed, do not induce vomiting. Never add water to this product.

Danger: Causes severe burns. May be fatal if swallowed. Read cautionary information.
Danger Poison: contains Sulfuric Acid (EINECNo. 231-639-5). Causes severe burns.
Keep out of the reach of children.

Price:$3.51 to $37.50
Same Day Shipping Deadline: Order by 12 Noon PT Monday-Friday.

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Color & Quantity
Item

$3.51
$5.99
Save 41%
1.25 oz
Status:In Stock
Model:30A
UPC:017163125303
Sku: AP030A
Id: 515726

$4.57
$7.99
Save 43%
4 oz
Status:In Stock
Model:30C
UPC:317163030301
Sku: AP030C
Id: 515727

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$13.89
$25.99
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16 oz
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Status:This item is temporarily out of stock.
Model:30B
UPC:017163020301
Sku: AP030B
Id: 525833

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$37.50
$71.99
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BULK - 48 Ounce - (3 x 16 Ounce)
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Status:This item is temporarily out of stock.
Model:030BM
UPC:688713107331
Sku: AP030BM
Id: 610971

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