Hello, I was given a little Xmas money so bought a bonsai tree today. When I got home I realised I was missing the leaflet which explains the 'easy care watering system' which I'm assuming is the stick thing. I can't find anything online. I'll attach a pic.... I can see the little plastic red ball is supposed to be in between two lines but it's not moving as I've watered the tree. Am I doing something really daft, am I supposed to pull the plastic thing out and add water down that?!