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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- pH 4.0 + 7.0 Calibration Solution Kit (500 ml Each)

Product ID: 32105900

Details

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

⏳Long shelf life, ready-to-use

🧪Dual pH 4.0 & 7.0 calibration

⚖️NIST traceable precision

$U5274

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Description

⚡ Calibrate like a pro, measure like a boss!

EFFORTLESS READY - Pre-mixed, ready-to-use solutions save time and eliminate guesswork in calibration.
VERSATILE APPLICATION - Perfect for hydroponics, aquariums, swimming pools, and garden soil monitoring.
DUAL CALIBRATION POWER - Includes both pH 4.0 and 7.0 buffers to cover a wide range of calibration needs.
PRECISION YOU CAN TRUST - NIST traceable solutions ensure lab-grade accuracy for your pH meters and pens.
EXTEND YOUR GEARS LIFESPAN - Regular calibration maintains peak performance and prolongs your pH meter’s life.

The Bluelab pH 4.0 + 7.0 Calibration Solution Kit offers two 500 ml bottles of NIST traceable, ready-to-use pH buffer solutions designed to ensure precise calibration of pH meters and pens. Ideal for professionals managing hydroponics, aquariums, pools, or soil health, this kit extends device longevity and guarantees reliable, accurate pH readings with minimal effort.

Specifications

ASIN	B01GQVSQGG
Best Sellers Rank	#20,328 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Electrolyte Solutions
Brand	Bluelab
Brand Name	Bluelab
Container Type	Bottle
Customer Reviews	4.7 out of 5 stars 1,156 Reviews
Included Components	One 500ml of ph4 and One 500ml of ph7
Item Form	Liquid
Item Highlight	For pH Meters and pH Pens - NIST Traceable
Item Volume	500 ml
Manufacturer	Bluelab
Model Number	BL-COMBO-1
Molecular Weight	32.06
Molecular weight	32.06
Package Information	Bottle
Part Number	BL-COMBO-1
Unit Count	2 Count
Volume	500 ml

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$U5274

Duties & taxes included

In stock

Sold byAmazon UruguayDelivered 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 Uruguay.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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1 month ago

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Perfect platform for hard-to-find items. Delivery was prompt.

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