Plug n Grow PNG060 CO2 Controller with High-Temp Shutoff Cleaning + Sanitation it's no longer plastic and

it's no longer plastic and has changed into a material that will degrade in the open environment

The top is slightly convex and ribbed

and soil grows

and interconnecting communication cables link the zones

Plug n Grow PNG060 CO2 Controller with High-Temp Shutoff Cleaning + Sanitation it's no longer plastic andSimple CO2 controller with display and day night detection. Very easy to install and set up. The PNG 060 comes with a high temperature shutoff to protect your plants from overheating: CO2 enrichment is stopped when the temperature set point is reached. Displays ambient CO2 level Day and night detection Adjustable CO2 setpoint from 400 ppm to 2100 ppm High temperature shutoff feature from 50 F to 130 F Adjustable differential Easy one button