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๐ Master your aquariumโs pH balance like a pro โ because your fish deserve the best!
API pH DOWN is a 4-ounce freshwater aquarium solution designed to safely lower pH levels using a 9.6% sulfuric acid formula. Its phosphate-free composition prevents algae growth and protects both plants and fish. Ideal for weekly pH adjustments, it slowly neutralizes alkaline substances to maintain a stable, healthy aquatic environment. Trusted by aquarists for over 50 years, API ensures your freshwater community thrives with minimal effort.
| ASIN | B0002AQMV4 |
| Allergen Information | Apple Free |
| Best Sellers Rank | #8,392 in Pet Supplies ( See Top 100 in Pet Supplies ) #53 in Aquarium Water Treatments |
| Brand | API |
| Brand Name | API |
| Customer Reviews | 4.6 out of 5 stars 2,986 Reviews |
| Global Trade Identification Number | 00317163030301 |
| Item Form | Liquid |
| Item Type Name | Aquarium pH adjuster |
| Item Weight | 4.8 ounces |
| Liquid Volume | 118 Milliliters |
| Manufacturer | Mars Fishcare |
| Manufacturer Part Number | 30C |
| Model Number | 30C |
| Number of Packs | 1 |
| Pet Type | Fish |
| Target Species | Fish |
| UPC | 317163030301 |
| Unit Count | 1 Count |
M**R
Works well lowering PH level
Does what it says, works well. It has no effects on my fish or plants.
K**A
Stabilize your water with this product!
If you are having a plan to properly setup a new big size aquarium or even water change, this is a good recommendation. Our pH was more than 8 when tested with pH aquarium test kit. Would recommend to follow the instructions correctly, particularly not to use too much within a day to stress the fishes. Water clarity is pretty good. Fishes were able to adapt this change & I see them performing healthier. Overall good product for money & easy to use.
J**Y
Fish Treatments
This is one of my favorite products on the market and I use it regularly since my area has high PH water.
D**.
Good stuff
It does a good, adequately changes pH and does it fast. It's easy to add to the water, just use the measuring cup in the cap. Use a test strip before and after and you should see the difference. I have a large aquatic turtle in a 300 gallon indoor pond and this product couldn't keep up with that long-term. What it did do was give me a safe way to treat the water for pH, temporarily, while I got an appropriate system in place. It's a good price for that kind of snappy resolution. Thank you!
R**O
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P**H
Helps my fish tanks
Work good
S**F
Easy to use for aquarium fish
Works just as advertised. Easy to use but you do need to have a ph testing kit to verify desired ph level.
L**.
Just as described
Just as described. I use quite regularly as water coming out of my tap is pH 9 or higher.
B**R
Good product
Works good follow instructions.
J**O
Easy directions and it works.
Easy directions and it works.
M**K
Five Stars
Works great. Repeat customer after first use.
A**R
Two doses produced a stable lower PH
Worked immediately. First dose rebounded a bit after a few days and a second dose stabilized the PH - has stayed stable since for several weeks.
D**.
Five Stars
Good price great delivery
Trustpilot
1 month ago
3 weeks ago