Uh I mean you can always have a huge koi pond
Or maybe try to get the worlds biggest BG growing, with some HSB to keep em under control.
Sounds like the wetland area would make em very happy for that part of the year.
Sounds also good for growing out craws to move into your main ponds.
Another alternative would be to check around and see if theres anything the baitfish market needs and have your 4th pond be a small money maker to offset costs of the other ponds :p
