pH Buffer Calibration Kit 2-Pack: pH 7.00 Buffer and Electrode Storage Solution — 500 ml (1.06 Pint) Each — NIST Traceable Reference Standard for All pH Meters

General Hydroponics HGC722080 pH Control Kit for A Balanced Nutrient Solution

Biopharm pH Buffer Calibration Solution Kit 2-Pack | 16oz (500 ml) Bottles | pH 4.00 and pH 7.00 | NIST Traceable Reference Standards for All pH Meters | Color Coded

1.5" Rockwool Starter Plugs, 2 Sheets of 49 Plugs (98 Plugs Total) + Twin Canaries Chart

General Hydroponics HGC714135 Rapid Rooter Plant Starters, 50 Plugs

VIVOSUN 10"x20.75" Seedling Heat Mat and Digital Thermostat Combo Set MET Standard

SX610 Waterproof pH Pen Tester, ±0.1 pH Accuracy, 0-14.0 pH Range, Suitable for Test Tube Testing, Replaceable Probe

iPower GLROPEX2 2-Pair 1/8 Inch 8-Feet Long Heavy Duty Adjustable Rope Clip Hanger (150lbs Weight Capacity) Reinforced Metal, 2 Pack, Black

Clonex 100524687 250 Ml Hydrodynamics Rooting Gel, White

200PCS 3ml Disposable Plastic Transfer Pipettes, Moveland Calibrated Dropper Suitable for Essential Oils & Science Laboratory

Apera Instruments AI311 Premium Series PH60 Waterproof pH Pocket Tester Kit, Replaceable Probe, ±0.01 pH Accuracy