I have heard that it is not good to place Plastic over you tray. I was told it makes for not a good enviroment.

Do you have a few pictures of your system?
Chabnoc Reviewed by Chabnoc on . Flood & Drain: Plant Roots Ok, I'm not going to ramble on too much as you are all welcome to visit my thread, linked in my signature, to find out all the details. I am working with a flood and drain system and have my plant roots exposed to light during the day cycle. A picture of my plant roots can be seen here: http://boards.cannabis.com/attachments/hydroponics/143389d1182869365-diary-31-05-07-flood-drain-1st-try-img_0054est.jpg I add H2 humic Acid to my reservoir on every change. This solution is almost black Rating: 5