5 out of 5
API pH Down Aquarium pH Adjuster, 4 oz, 30C
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Product Description
Manufacturer Part Number: 30C
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.
4 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.
4 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 Chaturved Sharma
Date: March 02, 2024
It's good to maintain right ph in aquarium.
Rating: 
[4 of 5 Stars!]
[4 of 5 Stars!]
By Chris
Date: December 30, 2023
Pricey
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By Lukas pazitka
Date: December 23, 2023
Honestly idk why it was recommended to use this it works like magic but damn it's toxic spilled some on shirt and it discolored it like bleach thinking at this point windex would do bout the same thing except it's toxic also can cause your skin to have a burn sensation so use gloves hope it's actually plant and animal safe
Rating: [4 of 5 Stars!]
[4 of 5 Stars!]
By BLue Iris 64
Date: December 15, 2023
Works as intended
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
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!]