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

Bluelab Ph 4 0 And 7 0 Calibration Solution 500ml

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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630 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered 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 Poland.

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Description

🧪 Elevate your grow game with precision calibration solutions that keep you ahead of the curve!

DUAL POINT CALIBRATION - Ensure spot-on readings with both pH 4.0 and 7.0 solutions tailored for professional growers.
PRECISION YOU CAN TRUST - Calibrate your Bluelab devices with lab-referenced solutions for flawless pH accuracy every time.
BULK SUPPLY FOR CONSISTENCY - 500ml bottle designed to last through multiple calibrations, keeping your grow on point.
EXTEND YOUR EQUIPMENTS LIFE - Maintain probe cleanliness and accuracy, preventing costly misreads and equipment wear.
EXCLUSIVE BLUELAB COMPATIBILITY - Formulated specifically for Bluelab products, guaranteeing seamless integration and peak performance.

The Bluelab pH 4.0 & 7.0 Calibration Solution (500ml) is a premium, lab-standard liquid designed exclusively for calibrating Bluelab pH meters. It ensures accurate, reliable readings by providing dual-point calibration, essential for professional growers who demand precision. The 500ml bottle offers long-lasting use, helping maintain probe cleanliness and extending device lifespan.

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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630 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered 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 Poland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago