Hydroponics is great for fast plant growth but things can quickly get out of hand with your nutrients and pH causing lock outs that can reduce your yield or even kill your plants. But with the Bluelab Guardian Monitor you will always know what is going on inside your reservoir.
This is the best monitor there is for nutrient applications needing constant monitoring. It measures PPM, pH and Temperature and with its large illuminated display it is easy to read from a distance. Calibration screws are conveniently located on the front for easy access. 6 month limited warranty.