Thanks Darkbird. I'll keep an eye on the care fresh. I'll be changing it every 2 weeks but if I notice any problems I'll try the 50/50 mix. It never is dry bc of how often I have to mist but if I notice mold I'll switch immediately. I'll make sure I don't use tap water with the mistking. I'll probably save myself the $100 and go with the v400 and not worry about the extra height. Could go with the v332 for the same price but would rather have the extra foot of floor space. Would rather have the 4 foot and not need it then the 3 foot and wish I had the extra foot.