General Hydroponics pH 7 Reference and Calibration Solution – $4.77 + free prime ship

General Hydroponics Ph 7.0 Calibration Solution - 8 Ounces, 1 bottle

General Hydroponics Ph 7.0 Calibration Solution – 8 Ounces

Use as a reference solution to see if your meter is reading correctly and a calibration solution for compatible meters.

9/22/18 2 AM Central: This is selling for just $4.77.  That’s a 37% discount from list. Shipping is also free to many US addresses with Prime Membership [Try Prime for Free] or a qualifying order. Prices, shipping and availability can change quickly. Please note that product prices and availability are subject to change. Prices and availability were accurate at the time this this post was published; however, they may differ from those you see when you visit Amazon. Check the product page for current price, description and availability. Also: Recent Amazon Finds and Amazon Fillers Resource Page

General Hydroponics Ph 7.0 Calibration Solution – 8 Ounces, 1 bottle


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