Weather Ball Barometer fans-ventilation-ducting Green Reign™ - 10 customized

Green Reign™ - 10 customized granular blends of all-natural ingredients with mycorrhizae

A quick-view observation window allows you to monitor your plants' progress without disrupting the internal climate

Wet or Dry Operation: Built to perform in all jobsite conditions

• Extra large fill opening prevents spills when adding chemical

and features a built-in battery indicator

Weather Ball Barometer fans-ventilation-ducting Green Reign™ - 10 customizedThe Weather Ball Barometer indicates changes in air pressure quickly and accurately. Torricelli (1608 1647) proved that air pressure was subject to variations and in 1643 he devised the first barometer. Goethe, the famous German playwright, who enjoyed scientific experiments, later developed his own simple, but effective barometer using the principles established by Torricelli. This barometer is based on Goethes design. The ball is filled with colored