you don't "need" a misting system. If you want to use a spray bottle and mist the cage manually 4 or 5 times a day you can do that too, you have to mist for a few minutes each time so a misting system is a great investment.. I'm using a mist king and it's a great system, set the timer and just keep the reservoir full, usually fill it up once a week. keeps everything nice and humid and don't have to worry about not being home