Can you reuse solutions?

Yes a couple of times but I wouldn’t pour it back in the bottle if you’ve used it already. For example I have 3 ph meters so I’ll put some of each in a cup and use the same solution to calibrate all 3 of my ph meters then toss the solution. The bottles last a long time though.

The bottle doesn’t specify how much solution to add to how much water to make the ph 7.0 and 4.0 solutions. It just says add the required amount???

You don't add anything its pre made to the ph level.

Can i use this solution for other brand ph meters ? i own a adwa ph meter, or is this only for bluelab products ?

It will work for all PH meters.

How often would I expect to run out of solution? I would hope for $45.00 this would last a t least a year.

I believe it will last a year I Calibrate my pen whenever it goes out of calibration which is usually about once a month

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Bluelab pH 4.0 & 7.0 Calibration Solution Kit - pH Meter & pH Pen Calibration for Balanced Nutrient Solution NIST Traceable | Hydroponics, Gardening & Growing Tents (500 ml/ 16.9 Fl Oz Each)

Product ID: 32105900

Details

Brand
Bluelab
Item Form
Liquid
Item Volume
500
Molecular weight
32.06
Package Information
Bottle

⏳Long shelf life, ready-to-use

🧪Dual pH 4.0 & 7.0 calibration

⚖️NIST traceable precision

€ 112.91

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Description

🌱 Calibrate like a pro, grow like a legend!

EFFORTLESS READY - Pre-mixed, ready-to-use bottles save you time and hassle—no mixing or measuring required.
OPTIMIZE YOUR GROWTH - Keep nutrient solutions perfectly balanced to maximize plant health and yield in any growing environment.
DUAL CALIBRATION POWER - Includes both pH 4.0 and 7.0 solutions to cover a wide range of calibration needs for hydroponics, gardening, and more.
PRECISION YOU CAN TRUST - NIST traceable solutions ensure your pH meter delivers lab-grade accuracy every time.
EXTEND YOUR METERS LIFE - Regular calibration maintains peak performance and significantly prolongs your pH pen’s lifespan.

The Bluelab pH 4.0 & 7.0 Calibration Solution Kit offers two 500ml bottles of NIST traceable, ready-to-use calibration liquids designed to ensure your pH meters provide accurate readings. Ideal for hydroponics, gardening, aquariums, and more, this kit helps maintain meter precision, extends device lifespan, and supports optimal nutrient balance for thriving plants.

Specifications

ASIN	B01GQVSQGG
Best Sellers Rank	#18,423 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #24 in Lab pH Meters
Brand Name	Bluelab
Container Type	Bottle
Customer Reviews	4.7 4.7 out of 5 stars (1,150)
Included Components	One 500ml of ph4 and One 500ml of ph7
Item Form	Liquid
Manufacturer	bluelab
Model Number	BL-COMBO-1
Molecular Weight	32.06
Part Number	BL-COMBO-1
Unit Count	2.0 Count
Volume	500 Milliliters

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€ 112.91

Duties & taxes included

In stock

Sold byAmazon AustriaDelivered 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 Austria.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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