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.
Item Number: 211554
Universal Product Code: 793094015417
Manufacturer: General Hydroponics
Manufacturer's Part Number: 1541
Brand: General Hydroponics
Not for sale in the following location(s): GU, PR, VI.