Bluelab pH 4.0 & 7.0 Calibration Solution Kit - pH Meter & pH Pen Calibration for Balanced Nutrient Solution NIST Traceable | Hydroponics, Gardening & Growing Tents (500 ml/ 16.9 Fl Oz Each)

Frequently Asked Questions

• What is the lowest price ever for this product? ▶
  The lowest price for Bluelab pH 40 amp 70 Calibration Solution Kit - pH Meter amp pH Pen Calibration for Balanced Nutrient Solution NIST Traceable Hydroponics Gardening amp Growing Tents 500 ml 169 Fl Oz Each was $19.99 on 17th Nov 2020. This is the best recorded deal so far.
• What is the highest price ever for this product? ▶
  The highest price for Bluelab pH 40 amp 70 Calibration Solution Kit - pH Meter amp pH Pen Calibration for Balanced Nutrient Solution NIST Traceable Hydroponics Gardening amp Growing Tents 500 ml 169 Fl Oz Each was $49.99 on 15th Sep 2025. Prices have dropped since then.
• What is the average price of this product? ▶
  The average price for Bluelab pH 40 amp 70 Calibration Solution Kit - pH Meter amp pH Pen Calibration for Balanced Nutrient Solution NIST Traceable Hydroponics Gardening amp Growing Tents 500 ml 169 Fl Oz Each is $32.22 (393 data points). This helps you compare current deals.
• What is the lowest price in the last 3 months? ▶
  In the last 3 months, Bluelab pH 40 amp 70 Calibration Solution Kit - pH Meter amp pH Pen Calibration for Balanced Nutrient Solution NIST Traceable Hydroponics Gardening amp Growing Tents 500 ml 169 Fl Oz Each reached a low of $35.99 on 22nd Nov 2025. Recent price trends may help you decide when to buy.
• Should I buy this product now? ▶
  Buy now. The price is excellent compared to its history. 62% chance price goes up. Price may increase soon.