Do you mean
SMB Spawning Bed Preparation from the Archives? I just kind of looked for it by name.
1. I built 25 for 1/2 acre. Dr. Perca says that is many more than I needed. I wouldn't build over 50 for 4 acres.
2. I think it's one SMB male per bed.
3. If you place some rocks and some logs near the kiddie pools, I bet it would work.