Oh I think I see what you are talking about. The net pots don't seat perfectly on the lid. Is that what you are seeing? I guess it would be nearly impossible for them to seat all the way due to those ridges on the lid. Although it is of course best to have no light leaks, I don't think that little bit would cause harm. I did a grow a few months ago and was putting round pots into square holes in a DWC. There were dime size (roughly) holes one each of the four corners of each pot. The plants came out fine.

herbie, if you did want to fix it, you could sand out the hole just a touch more, and the pot would fit down a little better. You could also get some artists putty or something similar to put around there, or just some white cardboard. I don't see it really being a problem, but it would be better if you covered it. If not for the leaks, at least for the white reflection bouncing light back at the plants.
Opie Yutts Reviewed by Opie Yutts on . Does this growth rate look ok? Thanks for looking. The pic on the left was from 9 days earlier of the back plant in the pic on the right. Does it look right? Wheres is that crazy growth I heard about? Rating: 5