OK, y'all, I started out thinking my pond for the boxies would be about 100 gal. Then decided to make it larger: easier to "
keep" the larger volume, plus I could have fishies -- maybe 300 gal. or so. Have taken a rough measurement of the area I have to work with, just for ballpark figures. Then started working on designs & shapes (posted a few of those ideas). Was thinking I'd be OK at around 1000 gal or so.
Well, most recent pond volume calculation showed me at 4000-5000 gals! Whoo! How did I get there!

I don't know, but that
seems like a
LOT of water, even though it doesn't
look like
that much space when I mark it out in the yard. Sort of a mitten-shape, not bad, but that volume.....
So I spent the morning re-measuring and re-drawing. Basically I came up with a potato-shaped pond, about 10' x 12' with a max depth of 3'. That still calculates out to between 2000 - 3000 gal. It's raining, so can't go out to "shape" it with the hose for a while.
Being a card-carrying newbie, I had
no idea how shape was going to translate to pond dimensions & volume (I'm a very visual person, so really
do have to SEE something to know what it will look like -- I'm keeping my eye out for some good but inexpensive pond-design software). And, of course, just reducing size of the design doesn't help 'cause that throws the proportions off.
Fortunately, I don't think the turtles are going to care

, as long as they have a healthy, safe place to soak. But, boy is the TURTLEMOMMY a little taken aback -- not bad, just have to put "expectaion" bar a little lower. I figure it happens to everyone first time around.