I don't find my small pond -- just big enough for my son's dog -- to be much of a problem or much work. Although, I do intend to redo the whole thing later this summer to make keeping the weeds down easier by making the edges mow-able.
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Mini-papyrus, curly reeds, and two water lilies sit in the water along with a dozen-ish goldfish, an increasing number of different frogs, and lots of toad tadpoles. Occasionally a passing bird will bring in fish eggs that hatch or (once) a blood sucker that faired well until it latched onto me.
Leaves in the fall is my biggest problem -- that and no electricity. . . .
yet. . and I do know how to address that if I choose. Of course, I bring the fish inside for the winter. That could be a bit more work if I didn't have the sunroom to winter them in.
Even with your husband's patio taking up part of the space, there is NOTHING so relaxing as the sound of falling water. I love watching the variety of birds attracted to my pond by day and love watching the bats swooping down to get a drink or to catch an insect attracted to the (solar) lights. It is a whole new learning environment for the little ones.
Hopefully, once the pond is redone, we can keep DS's great Dane from jumping in for a dip.