Hello, You might say..... What? What is he talking about? Well I recently purchased some of these water expanding balls which can be used for bamboos etc... They come in small packets as little, little bals and once put in water they expand 150 times their size. Since they hold moisture in them, something came up. Would it be a good idea to fill a wtaer wll with lets say. 5 - 6 balls? This way the humditiy would be constant as water would not be drying out as these balls take 6 + months to dry.