its hard to tell but it looks like the big rockwool cubes are sticking pretty far above the top of the flood tray. Are you going to be able to flood 2/3 of them that way? I don't know how tall your overflow is but you also gotta think that you can't flood the tray completely to the top anyways because of overflowing..

Then again, there's no plants in there yet so perhaps you just set it up quickly to take some example pictures and you'll have everything perfect when it's actually go time, if that be the case than please go ahead and disregard above comments.

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