The Grower's Handbook by David Robinson pest and TDS (ppm) tester that

and TDS (ppm) tester that makes measuring quick and easy

and all models now have a boost function that accelerates the chilling process for quicker establishment of desired nutrient solution temperature

Contact us for support with growing issues

Local data logging with cloud data logging backup

you don’t have to be too worried about harming your plants with too much

The Grower's Handbook by David Robinson pest and TDS (ppm) tester thatThe Garden Sage David Robinson is a true cash crop professional that has been guiding gardeners to their greatest successes for over 15 years. Working full time on the retail floors of busy hydroponic stores in British Columbia has allowed the Garden Sage to deal with an incalculable variance of challenging situations.