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📊 Calibrate like a pro, grow like a boss!
The Bluelab pH 4.0 & 7.0 Calibration Solution (500ml) is a premium, lab-standard liquid calibration set designed exclusively for Bluelab pH meters. It ensures precise, reliable readings by providing dual buffer solutions for acidic and neutral pH calibration, while the included conductivity standard helps maintain probe cleanliness. Trusted by over 1,100 users with a 4.7-star rating, this 500ml bottle supports multiple calibrations, making it an essential tool for professional growers committed to accuracy and optimal plant health.
| ASIN | B01GQVSQGG |
| Brand | Bluelab |
| Brand Name | Bluelab |
| Container Type | Bottle |
| Customer Reviews | 4.7 out of 5 stars 1,102 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 |
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
J**N
When it has to be spot on
Can’t beat Blue lab products
R**A
Works Well
I own the blue lab ph pen and EC meter, and these solutions are perfect for calibration of the pH pen. I bought large bottles, still working super well a year later, probably have enough to last me another 3 years of regular monthly calibration checks/calibrations. Between the nice test pen and these solutions my hydroponic results have improved. Good stuff.
M**L
Great value for the money
I do not dislike anything about this product is my first time using this product with a blue lab pH pen I’ve got to say it’s worth the money both these are 16.9 fl oz. This will probably last me the next 12 months.
H**S
Great
Great as expected
Trustpilot
1 month ago
2 days ago