I saw your picture and thought the same thing! I stopped using a bowl and sponge, I had it on top of the screen but took up so much room and I found if I just pour it on the bottom of the cooler I get a larger area of water and my humidity goes up. With the sponge and bowl I couldn't get humidity higher than 35%. I only have about 3/4 of an inch between the screen and bottom but since I don't put a lot of water in there I don't have to worry about flopping chicks drowning.