All our egg shells are recycled in the oyster shell bag.
Garfield
Do you have to clean first? I use mine in the worm bin.
What does this do for the water chemistry?
Adam
The egg shell is high calcium, probably calcium carbonate. The calcium will increase the GH hardness, if it dissolves and dissociates. The carbonate would become a member of the bicarbonate KH reducing the level of the acids in a pond. The pond would probably have to be on the acid side to have the egg shells dissolve. Slow acting buffer.
Zone 7 A/B
Keep your words sweet. You never know when you may have to eat them.
Richard