5 out of 5
API pH Down Aquarium pH Adjuster, 16 oz, 30B
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Product Description
Manufacturer Part Number: 30B
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 and 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.
16 oz
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 and 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.
16 oz
Attention CA Residents: Prop 65 Warning
WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
Need more information?
Our staff are available to answer any questions you may have about this item
Our staff are available to answer any questions you may have about this item
Customer Reviews
By Jax
Date: August 08, 2023
Due to what I feed my plants, I am forever adding this product. It lowers the ph slowly, as it should.
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By Panda-Pooh
Date: August 04, 2023
Was what I was looking for works well for my fresh water aquarium
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Ken
Date: June 02, 2023
Worked as it was meant to
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By James Dandridge II
Date: February 06, 2023
Works as advertised.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Tracey Schmitt
Date: December 30, 2022
This has been wonderful and I use it with EVERY water change. We have city water and it helps me stabilize the fish tank with every water change. Very easy to use but do follow the directions. You ONLY NEED A LITTLE BIT considering the amount of water in the tank.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Nora Guzman
Date: December 19, 2022
Needed alot and the small bottles were not doing it. Worked good
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]