TrolMaster Digital CO2 PPM Controller, for Regulator and Generator Cleaning + Sanitation The Bluelab pH Pen is

The Bluelab pH Pen is the latest innovation for hand held pH meters and is the ultimate handy solution for measuring pH

or other indoor plant locations

Warranty and Support: Comes with a 3-year limited warranty

Fittings are 1/2 inch

This lamp pairs with DE 315W CMH fixtures and ballasts — note that short-wave ultraviolet radiation is present

TrolMaster Digital CO2 PPM Controller, for Regulator and Generator Cleaning + Sanitation The Bluelab pH Pen isTrolMaster BETA8 Digital CO2 PPM Controller TheTrolMaster BETA8 Digital CO2 PPM Controller is a simple and affordable way to control your CO2 injection device. Choose your desired CO2 parts per million (PPM) level and the BETA8 controller will automatically maintain that specified CO2 level. A built in photocell located on the remote sensor automatically deactivates CO2 injection during the night time. A remote sensor with 16' cable allows close