Cannabis

The standard irrigation tray
The Ebb/Flow tray is a standard tray with a closed bottom. The tray is very flexible on how and where to place the plants. You can place the plants close together in the initial grow stage and place them with distance at a later grow stage.   

Narrow standard trays
A certain number of narrow standard irrigation trays are put in a bench frame and positioned with distance between them.
Using this grow layout, you will improve the vertical air flow between the plants. The tradeoff is a reduced grow area and less flexibility.

Air trays
The air trays are created for improved air flow and mainly used in mobile bench systems. The trays are produced with one or several rows of oblong conical manifolds. When the manifolds are cut open, they will work as venturis. The circulating air will accelerate, and a slight pressure drop will occur around the outlets, causing continuous and improved airflow around the plants. Using the air trays, the bench frames can be put very close together, increasing the grow area significantly.