Use VitaLink ESSENTIALS Buffer solution to calibrate pH meters. This pH 4 Buffer solution gives an accurate representation of the pH scale at pH4 to measure against.
Use VitaLink ESSENTIALS Buffer 7 for a 2 point calibration scale. This will give an accurate range of measurement that hydroponic nutrients work within.
Perfect for use with the ESSENTIALS pH meter
Available in 250ml size
Shipping & Handling
We strive to provide the best service possible, with the highest regards to quality and shipping.
Here's what you can expect when placing an order with The Hydroponics Store:
All orders are shipped in discreet packaging for your privacy.
We work hard to have your order shipped out within 24 business hours but sometimes we're swamped, so it could take up to 48 business hours.
Orders ship via USPS by First Class Mail unless you select Priority.
First Class orders can take 3-5 business days to arrive.
Priority orders take 2-3 business days to arrive.
You'll receive an email and text message providing you with a tracking number once your package has been sent out.