The care and maintenance of the pond is minimal. Our pond has a skimmer that pulls water in and catches floating debris, a UV filter system to help control algae growth, then there's the waterfall which oxygenates the water. We have been using a tiny bit of algaecide once per week because our pond is in full sun. Our goal is to cover half of the water surface with plants. The plants help with all aspects of the habitat. We also add water every few days.
With the pond at our last house, we drained a good bit of the water once per year to clean things up and I suspect we will do the same here. The filters have to be cleaned at that time too.
The fish are like little puppies that come to us now when we walk to the pond.
The frogs are happily living here and sing out loud every night.