Lol..I hadn't noticed...but now you mention it I can see it too :) I think these guys and gals must have been really upset with me for digging them out .
I hope to afford one when i get some money next year, until then i am going to have to try using milk cartons (2 ltr) and rotate them. Fortunaetley we havent had any heatwaves yet this summer. so i have been putting the airconditioner on in the room. The hottest day outside was 37 and i kept the room under 27 with the aircon set at 15 blowing straight onto the tank.