GT Silica 1L trim It also has a 1-point

It also has a 1-point automatic calibration function

If you want to take your plants to the next level of health and growth

The 150-micron mesh screen is made of medical grade stainless steel

Sensor size: 1/4"

The Medical Planter uses patent pending Air Channels in  each Ez-Pz Planter Pot which ensure a steady flow of oxygen is present for your plant roots – eliminating any chances of rot root

GT Silica 1L trim It also has a 1-pointSilicon is the second most abundant element in the earths crust making up a component of most rocks. Plants absorb silicon from silica that has dissolved into the soil water. As you can imagine the concentration of silicon in soil water is not that high because rocks do not tend to be all that soluble. Silicon concentration in soil water generally does not get above 20 ppm and this is the level we recommend for hydroponic nutrient solutions. Silicon