Hi teehjaeh57,
Thank you for the reply and volunteer efforts! Unfortunately we don't have much clay available around here, and the amount we would need would be extremely high. Then again, I am new to this world, so any suggestions for how to source the clay would be appreciated. Some friends have their house on the only deposit (about 6.5 acres) within several miles. I jokingly asked them if they'd be willing to sell some to us, while making a pond for them at the same time!

I'm sure I'll be in touch more soon.

Thank you,
Steven