Bluelab pH 7.0 Solution 250ml — Premium Calibration Buffer

Bluelab pH 7.0 Solution 250ml — Lab-Standard Calibration Buffer

Bluelab Calibration Solutions are an essential part of a serious grower's toolbox — manufactured specifically for the calibration process and referenced to high laboratory standards by Bluelab. Required for the calibration of pH meters, pH monitors, and controllers. Regular cleaning and calibrating of pH measuring equipment ensures accurate readings, which directly impacts the success of every grow.

Why growers choose Bluelab pH 7.0:

• Lab-standard reference — referenced to high laboratory standards, not generic
• Specifically for pH meter calibration — purpose-formulated chemistry
• Pair with pH 4.0 solution — two-point calibration is significantly more accurate than single-point
• Compatible with all Bluelab meters — guaranteed Bluelab compatibility
• Works with any pH meter brand — pH calibration chemistry is universal
• 250ml premium size — enough for many calibration sessions, sealed storage life
• Recommended every 2-4 weeks — standard calibration schedule for serious growers

Who it's not for:

Don't reuse solution after probe contact — pour a small amount into a separate container, calibrate, then discard. Contaminated solution gives bad calibration, defeating the purpose. Keep bottle sealed between uses; air exposure degrades accuracy over months. For budget calibration, Growth Technology pH 7 Buffer at lower cost works adequately for most home growers; Bluelab is laboratory-grade for those who want maximum accuracy.

In stock now — ships same working day from our Staffordshire warehouse with free UK delivery over £100. Pick up in-store at our Stone shop (ST15 0SR) if you're local, or click & collect at checkout.