I just melted a replaceable head clearomizer with my new 3 part pear/2 part peach/1 part pineapple juice. 2 others of my newly ordered juices are citrus based also and I don't want to melt down my other clearo's too. I will be getting a few Pro tanks in the future but are there any low priced tanks delivery system that you would recommend? Oh and does anyone know why my coffee juice is turning dark brown in my clearomizer?