What can be done if whether through our own fault (regular use of conditioner fluid was neglected) or other circumstances (prolonged storage of our waterbed mattress) the waterbed mattress exhibits a foul smell? Do we need to change the water, or perhaps even the mattress? Not necessarily, since Shock Formula restores the condition of our waterbed mattress no matter how deteriorated. Its use is also advised prior to long-term storage so on being refilled our mattress will be just like it was before being stored.  437 ml.