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77 EC conductivity standard calibration solution
accurate pH readings range between pH 3
Hang card display
but can still be subject to attacks from smaller microbes such as bacteria
This means that both versions pass strict testing for Saponin
Grodan Stonewool MacroPlugs (Case of 35 Bags) HGC706120 77 EC conductivity standard calibrationMacroPlugs are 1. 5 in round with a slit that allows easy insertion of a cutting. These loose round plugs fit perfectly into the Gro Block hole. For best results, always insert MacroPlugs in a tray with individual cells. The individual cell will make sure the plug stays closed around the stem of your cutting.
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