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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 | #8,530 in Pet Supplies ( See Top 100 in Pet Supplies ) #58 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 | 0.3 Pounds |
| 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**E
PH Down for high PH Tap water and fish
Most fish don't do well with super high ph water like we have here in Eastern Washington. I put a capful in every bucket when I refill the water to keep the PH down at a more neutral level for my tropical fish. Works well.
H**.
did not do a lot for my tank
it could just be my tank i have hard water so could affect that fish were fine at least for me did not seem to lower ph really so cant say its bad as could be user error will try in some water without a filter and see for a test XD so I would say test it in water outside your tank like same type of water just to see if you should bother or not and if it dose lower it like you want then go for it
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 week ago
2 months ago