The easy-to-operate DOH-SD1 Series dissolved-oxygen meter has a real-time SD-card data logger. The meter features an LCD with green light backlighting, altitude and salt adjustments, RS-232/USB ...

Dissolved oxygen is a measure of the amount of gaseous oxygen (as O 2) dissolved in water. Oxygen enters the river water from the atmosphere (via diffusion), from groundwater, and also as a by-product ...

After all the work you’ve done with lighting, extractor fans, nutrients, grow medium, watering and everything else you need to consider when growing good cannabis indoors, an invisible component of ...