Just like indoor aquariums, fish ponds are not for the faint of heart. They take a lot of time and effort, love and care. They can be time consuming to keep clean and budget draining. But as with most difficult things in life, the payoff is worth it.
Deeper ponds have their advantages. Fish will grow only in relation to how big the space is that they’re in. In shallow water a koi fish, which can reach 3 feet in length, won’t reach its full potential, as it would in a 5-foot-deep pond. Fish tend to get sicker in small ponds, because they’re swimming around in water with higher concentrations of their own waste. Deeper ponds mean more water volume and cleaner water. The fish are healthier, making it easier to maintain the right chemical balance. Deeper ponds make fish harder targets for predators.
There are advantages to shallower ponds. Less excavation means less work and fewer materials, so you’ll save money on construction costs and backaches. A shallow pond will also allow you a better view of your fish.
Smaller ponds obviously take up less space and can lend themselves to small design flourishes that make a big statement.
While koi are the most popular choice for fish ponds, they are harder to look after (to keep alive), especially in shallow ponds and winter freeze. We recommend adding fancy goldfish. In addition to having ornate patterns and colors almost identical to those of koi, they’re less aggressive and less expensive.
More lovely photos here.