A few questions:
1) Should I have the cotton wool at the bottom of the tube, or just have the tube go straight into the clay granules? Will the cotton go mouldy?
2) How far into the clay should the tube go? In the picture it stops on the far left, will the whole clay get moisture from this? Would it be better to have the tube continue horizontally through to the middle of the clay?
3) In the picture I have the water half way up the tube. Is this right? Should the tube normally have water in it? Or should I just add water until it soaks into the clay and then leave the tube empty?
4) How do I know when I've added enough water? Should I just add enough so that the clay looks moist, or should I be able to see a water line in the clay section?
Any help appreciated. Thanks chaps.


this is how ppl have set it up. To answer your questions



