Garden ponds give a great deal of pleasure and are simple to construct and maintain.

However, once you begin keeping fish, water gardening can become a lot more complicated. And if you decide to keep Koi, that's when it gets even more technical.

Fortunately there's a huge range of equipment out there designed to keep your fish healthy and your pond clear. But it could also keep your wallet empty, if you're not careful....

So make sure that you only buy what you need. Read our equipment guides first to get an overview and an understanding of what all these things do, so you don't become too dazed by the catalogues.