![Bluelab 2.77EC Conductivity Solution 250 ml (6/Cs)](http://goodgrow.com/cdn/shop/products/HGC732899-01_782a3519-ba33-4be2-b477-cefddbcb0330_{width}x.jpg?v=1632667623)
The 2.77EC solution is used as a reference or checking solution to ensure you have adequately cleaned the EC/ppm probe. Calibration Solution should be stored in a cool place out of direct sun and heat. Please keep out of reach of children. They should be stored with the lids securely tightened.""