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 concentrated formula

🧪Detoxifies chlorine & heavy metals

⚖️Precise pH 6.5 stabilization

€ 23.93

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Description

🐠 Keep your tank’s vibe just right — because your fish deserve the perfect pH!

ADVANCED TAP WATER DETOX - Neutralizes harmful chlorine, chloramines, and heavy metals, transforming tap water into a safe haven for your aquatic pets.
TRUSTED LEGACY PROVEN RESULTS - Backed by over 50 years of API innovation, join thousands of aquarists who rely on this formula to keep their tanks healthy and colorful.
PERFECT P H BALANCE FOR VIBRANT FISH - Sets and stabilizes aquarium water to an optimal pH of 6.5, ensuring your freshwater fish thrive in their ideal environment.
TAILORED FOR FRESHWATER ENTHUSIASTS - Specifically formulated for freshwater tanks without live plants, perfect for popular species like Tetras, Discus, and Angelfish.
EFFORTLESS AQUARIUM SETUP MAINTENANCE - Use during new tank setups, water changes, or pH adjustments to maintain consistent water quality with minimal hassle.

API PROPER pH 6.5 Freshwater Aquarium Water pH Stabilizer is an 8.5-ounce treatment that precisely sets and maintains aquarium water at a pH of 6.5. It detoxifies tap water by removing chlorine, chloramines, and heavy metals, creating a safe, stable environment ideal for freshwater fish species such as Tetras and Discus. Designed for use in tanks without live plants, it supports both new setups and ongoing water maintenance, backed by API’s 50+ years of aquatic care expertise.

Specifications

ASIN	B0002AQMW8
ASIN	B0002AQMW8
Allergen Information	Apple Free
Best Sellers Rank	#68,228 in Pet Supplies ( See Top 100 in Pet Supplies ) #594 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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€ 23.93

Duties & taxes included

In stock

Sold byAmazon PortugalDelivered 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 Portugal.

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TrustScore 4.5 | 7,300+ reviews

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