Setter, when I built my pond I cut 55gal drums into sections about 8"s. I'd read that they prefer 2-4' depth so that is where I placed them with about 5"s of gravel in em. I also put one or two basketball sized boulders near them. Found out that I have a ground water level pond and the water level varies from 20-30'. I've had good recruitment from the first spring I put the SMB in. Last yr when I came back from Fl in early May I found one bedding in about 10"s of water on my sand beach. Got a feeling you will have enough of em.

Do nature a favor, spay/neuter your pets and any weird friends or relatives.