This unique ideas starts with a large flower pot and ends with clean water for your fish or garden pond. The mechanics of the diy pond filter system are housed inside of a large flower pot so it blends in with the If you have a large plastic flower pot on hand, the cost for this DIY filter is close to zero. 10 DIY Pond And Easy to Build â€“ Home Please note: You are currently browsing img decoration, beautiful luxury small indoor koi pond design that is 2272x1704px in size. This image is listed in garden pond decoration ideas category. 10 DIY Pond And Easy to Build Home, 2272x1704 in 674.28 KB.