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 (500ml)

Bluelab pH 4.0 & 7.0 Calibration Solution (500ml)

Product ID: 712457668

Details

Brand
Bluelab
Item form
Liquid
Item volume
500
Manufacturer
Bluelab
Package information
Bottle

🌱Essential for optimal plant growth monitoring

🧪Lab-grade solution for unmatched accuracy

⚗️Precise pH calibration at 4.0 & 7.0

SAR 364

Duties & taxes included

In stock

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Description

⚗️ Stay calibrated, stay ahead – precision that cultivates success!

LAB STANDARD PURITY - Manufactured to rigorous laboratory standards ensuring your Bluelab devices deliver consistent, reliable readings.
CONTAMINATION CONTROL - Designed for easy decanting to prevent cross-contamination, preserving the integrity of your calibration process.
EXTEND DEVICE LIFESPAN - Regular calibration with these solutions keeps your Bluelab probes accurate and durable, saving you replacement costs.
TRUSTED BY PROFESSIONALS - Over 1,000 five-star reviews prove this is the go-to calibration solution for serious growers and lab technicians alike.
DUAL P H CALIBRATION POWER - Calibrate your pH meter at both acidic (4.0) and neutral (7.0) points for flawless accuracy every time.

Bluelab's pH 4.0 & 7.0 Calibration Solution (500ml) is a premium, lab-grade liquid designed specifically for calibrating Bluelab pH meters. It ensures precise, reliable readings essential for plant health monitoring and probe longevity. Trusted by over a thousand professionals, this solution prevents contamination and maintains device accuracy, making it an indispensable tool for growers and lab users.

Specifications

ASIN	B01GQVSQGG
Brand	Bluelab
Brand Name	Bluelab
Container Type	Bottle
Customer Reviews	4.7 out of 5 stars 1,099 Reviews
Item Form	Liquid
Item form	Liquid
Item volume	500 Milliliters
Manufacturer	Bluelab
Model Number	BL-COMBO-1
Package information	Bottle
Part Number	BL-COMBO-1
Volume	500 Milliliters

Reviews

M**J

Perfect

I followed the directions to the letter and the calibration solutions worked perfectly. I feel so much better about my grow knowing the reading I am getting are true readings. The solution hand my Blue Labs OnePen with perfectly calibrated and fast results

25.10.2024

J**N

When it has to be spot on

Can’t beat Blue lab products

4.07.2026

S**N

Good

10.03.2026

M**G

Fast delivery, quality products

9.04.2025

H**S

Great

Great as expected

25.05.2026

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