Using Egg Shells

I have now learnt a better way to use egg shells in the worm farm by watching this video

I hope that it does improve the soil as much as Patrick mentions in the video as anyway that I can recycle and improve things is a bonus. I am fortunate to once again be able to get access to extra supplies as the ladies at the college canteen have offered to save some for me each week as well. These two photos show the egg shells after washing and microwaving and then after being ground in the coffee grinder.