I recently made my own DWC and unfortunately it had a semi clear lid but i wanted to to be fully covered becouse roots dont like light so this is my DIY on how i made a DWC Bottom Reflector
Materials:
Paper
Scissors
Tape
Stapler
Sheet Protector

^This is a top view of my DWC before^

^Trace your DWC and the hole for the net pot on the^ construction paper then place it in the sheet protector^
^cut it out and the net pot hole roll a piece of tape up sticky side out to make double sided tape and place two on each side of the construction paper press it down with the sheet protector ^

^ staple at four sides to make shure things dont get out of
line^

^above is the reflector in use^

^Just a closer pic^
comment and tell me what you think

any one there?

wow this thread got no love!!!!!!!!
It's good to see a DIY, instead of "wasting" money on a prebuilt.
thanks for sharing.