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Ships within 48 hours · Estimated delivery Oct 6 - Oct 11
4" x 4" x 3"
This revolutionary reflector can increase lumen availability by as much as 300% and is now included
ORGANOCIDE™ 3-in-1 Ready to Use Garden Spray is an OMRI listed Insecticide
Transplant your Gro-Block plant onto a slab just like professional growers
EC and TDS meters (NaCl scale or the 442 scale)
GH pH 4.01 Calibration Solution Quart Gro Pro 4" x 4" x 3"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.