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or similar surfaces
That matters when the material underneath is fragile and should not have weight resting on it
commercial growers worldwide have trusted and relied on Grodan Pargro QD Biggie blocks for their hydroponic operations
The 16-gauge conductor matches the gauge most ballast manufacturers spec for medium-distance feeders
Boveda 62% 4g Individually Wrapped Bulk - 600 Pack Water Treatment or similar surfacesBoveda 4g 62% Individually Wrapped Humidity Control Packs, 600 Count Each 4 g pack holds a half ounce at 62% RH, adding or pulling moisture as a sealed jar drifts. Boveda's own figure is 15% higher weight retention against material stored without it, which is where the packaging economics land. At 2" x 2" it sits flat under an eighth or quarter jar lid without eating usable volume. The fill is food grade salt, purified water and a thickening agent
