Has anyone tried growing wheatgrass using 2 trays? This is where you water the plants from below and allow the roots to capture as much water as they need. I'm hoping it prevents mould. I'm experimenting with adding my kelp meal to the second tray instead of sprinkling on top but was reading that it should be in the soil...

Also, my wheatgrass is not as green as I think it should be. I've got 40W grow lights from the hardware store (four of them) and lots of indirect light coming in from a window. Any suggestions on how to increase chlorophyll?