I'm not sure if this is a reported issue or not tried searching for it and couldn't find it. When placing sponges to clear out water they don't retain the water I guess is what you would call it. You can place a line of sponges and by the time you get down to the end of your line you turn around the water is filling back up. I'm not sure if it's the water souces that are left that makes it fill back up but something isn't working correctly.