temperature in the tank stable because the steel can get cold very quickly and heat up as we know from our tin roofs.  Put up a gazebo around it with some doors to make it safe and it is ready to grow. We kept the colours of the beds to match the "decor" of the school so it fits in really well.  There are other raised garden beds around the school and this set up consistently out grows all of them. (bit of a plug there lol). I will endeavour to do a walk through of this school garden as soon as time permits.  I hope you have gained some tips for your set up, especially for using soil and reclaimed cardboard for your own integrated garden. Might as well subscribe to our youtube channel which will keep you posted.