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with heavy Magnesium and Sulfur
super strong nylon material
act as an organic catalyst in biological processes
A-OK plugs come in a sheet that fits a standard 10x20 flat
and yield just 2-3 pounds
GroStar GS2 Soil pH Pen soil with heavy Magnesium and SulfurIncludes: pH 7 & pH 4 solution (50ml bottles of each), KCL soaking solution (10ml bottle), cleaning brush, hole dibber, lanyard and user manual Measures pH and temperature in nutrient solution, soil, coco coir, rockwool, and many other media types Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance Impact resistant spear glass tip, 10 times stronger than conventional glass bulb PTFE ring prevents a
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