75% off General Hydroponics Standard Reference Solution 1500

75% off General Hydroponics Standard Reference Solution 1500

Regular price
$8.99
Sale price
$1.99
Shipping calculated at checkout.

General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General Hydroponics™ technicians check each batch to ensure that our solutions are precisely calibrated and yield reliable readings each time they are used.