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Rinse the probe with clean water
Auto 9 XL or Auto8 tray) supply hole to a 12
Quicker Rooting
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AquaMaster S300 Pro 2 Substrate Pen - pH, temp scale Rinse the probe with cleanS300 Pro 2 Substrate pH & Temp Meter Precision Testing for Cannabis Growing Media Accurate pH & Temperature Readings Right at the Root Zone The S300 Pro 2 Substrate Meter is your go to tool for measuring pH and temperature directly in moist substrates like coco coir, soil, or rockwoolessential for cannabis cultivators who want to keep root zone conditions dialed in. Whether you're growing indoors or out, in pots or raised beds, this meter delivers
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