I have a 37 gallon tank and used enough for 30 gallons to make up for tank decorations. But the ph stabilized at 3.8. Any idea why this happened?

It won’t stabilize overnight. You have to slowly keep building ..remember filtration , water evaporates/added must account…if you do any water, put some in there and test to see if proper ph is reached

Have added twice and Ph is not adjusting. What am I doing wrong?

Are you using a liquid test or test strips? Generally test strips are inaccurate.

Why does the package say not to use with live plants?

Proper pH 6.5, 7.0 and 7.5 buffer the aquarium to stabilize the pH. As with any true aquarium buffer below 7.8 one of active ingredients is a phosphate based buffer. Any product below 7.8 that is not phosphate-based is simply a pH adjuster, and will not stabilize the pH of your aquarium. While phosphate is normally considered an algae-promoting nutrient, the phosphate level in Proper pH will not promote algae growth. However, the phosphate buffers in Proper pH will bind to essential trace elements, such as iron. Without essential iron, algae and aquatic plants grow poorly. While we have many people that use Proper pH in planted aquariums we do not recommend using it. If you want to adjust pH in planted aquarium we recommend API pH UP or API pH Down.

Is it safe for crayfish?

Yes, this can be used for crayfish.

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API PROPER pH 6.5 Freshwater Aquarium Water pH Stabilizer 8.5-Ounce Container

Product ID: 12525177

Details

Brand
API
Item Form
Liquid
Item Weight
9.6 ounces
Number of Packs
1
Unit Count
1 Count

💧8.5 oz liquid formula for easy dosing

🧪removes chlorine & detoxifies heavy metals

⚖️pH stabilized precisely at 6.5

₹ 2506

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Description

🐠 Keep your fish thriving with perfectly balanced water — because your aquarium deserves the best!

TRUSTED LEGACY - Backed by 50+ years of API’s research-driven aquarium care expertise
TOXIN FREE WATER - Neutralizes chloramines and detoxifies heavy metals for safe aquatic life
PRECISION P H CONTROL - Maintains optimal 6.5 pH for vibrant freshwater fish health
EFFORTLESS AQUARIUM SETUP - Ideal for new tanks or water changes to stabilize conditions fast
PLANT FREE FRESHWATER FOCUS - Specifically formulated for freshwater tanks without live plants

API PROPER pH 6.5 Freshwater Aquarium Water pH Stabilizer is an 8.5-ounce liquid treatment designed to set and maintain a stable pH of 6.5 in freshwater aquariums without live plants. It removes harmful chlorine, chloramines, and heavy metals from tap water, creating a safe, toxin-free environment that supports the health and vibrant colors of tropical fish like Tetras and Discus. Ideal for new setups, water changes, or pH adjustments, this trusted formula from API leverages over 50 years of expertise to simplify aquarium care and promote thriving aquatic life.

Specifications

ASIN	B0002AQMW8
ASIN	B0002AQMW8
Allergen Information	Apple Free
Best Sellers Rank	#49,378 in Pet Supplies ( See Top 100 in Pet Supplies ) #437 in Aquarium Water Treatments
Brand Name	API
Customer Reviews	4.3 4.3 out of 5 stars (310)
Date First Available	June 8, 2005
Department	Unisex-Adult
Global Trade Identification Number	00317163030356
Item Form	Liquid
Item Type Name	Aquarium pH adjuster
Item Weight	9.6 ounces
Item model number	35C
Language	English
Manufacturer	Mars Fishcare
Manufacturer	Mars Fishcare
Manufacturer Part Number	35C
Model Number	35C
Number of Items	1
Number of Packs	1
Pet Type	Fish
Product Dimensions	2.13 x 2.13 x 5 inches; 9.6 ounces
Target Species	Fish
UPC	317163030356
Unit Count	1 Count

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₹ 2506

Duties & taxes included

In stock

Sold byAmazon IndiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to India.

Secure transaction

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Fast, free shipping, member pricing & priority support.

Join PRO →

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TrustScore 4.5 | 7,300+ reviews

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