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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 1,100 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
S**N
Good
Good
M**G
Fast delivery, quality products
Fast delivery, quality products
H**S
Great
Great as expected
Trustpilot
1 week ago
2 weeks ago