Sue, our "dirt" is nothing but clay, and hard as a rock. I spent yesterday afternoon/evening and this afternoon working on leveling the side. My back is pretty mad at me,
. I made a shelf on one end, for marginals, and I may make a bog area around the front edge. The shelf is about a foot deep, and maybe 2.5 feet wide. I'm going to support the shelf with a couple cinder blocks. Then I'm lining the pond with someone's old carpet. My dad's friend did this about 6 years ago, and it's worked great. It will cover any rocks I've missed, and keep the cinder blocks from cutting thru my liner. Then I will put the liner on top. I'm going to make a 1 1/2 foot wide lip around the edge of the pond, to prevent yard water runoff from going in the pond, and make the edges a bit more stable. I'll cover that with liner and rocks, to hold it down/hide it. The bottom will be flat, other than the shelf area.
I'm going to be ordering the bio filter, pump, ect next week. I'm still kinda undecided. I'm horribly impulsive. I've wanted a real pond for years. My little 100 gallon preformed pond wasn't cutting it. So when my husband took the fence down, I jumped at the chance. I have the hole, and a thousand ideas, but haven't really planned. I'm winging it,
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I think my pond will be between 2500 - 3000 gallons when all is said and done. I will go research the sub-forums tonight, and see what you guys think is the best for pumps and filters, ect. Any advice, along with what has already been given, is very much appreciated. Thank you guys, I love hearing your opinions! And the squito fish are going to be sent packing to my horse tanks out in the pasture. Hasta la vista, babies.