Quote Originally Posted by Kush Over
Egg shells are really awesome. I dig egg shells.

They've got calcium, some other trace elements, and a balanced NPK [ ~1.2-0.4-0.1 ].

As far as altering the pH. I assume it may.

As far as using them. The shells need to be dried first, then ground to a near fine powder if you intend on using them as a semi-water soluble 'formula'. If you'd prefer to wait you can crunch them up as much as you possibly can, then toss them in a compost.
Fantastic Kush.

Thanks for the info, much obliged