| Once the pond is up and running, you will need to be | | | | layout. |
| able to dispose of foul pond water. If local regulations | | | | Be prepared to modify your plans if any potential |
| permit it, then the bottom drains of settlement and | | | | problems become reality. So, what is a formal koi |
| filter bays can be plumbed straight to the mains | | | | pond? A koi pond may be built wholly into the |
| sewer. | | | | ground, part in and part above ground or completely |
| Is a suitable sewage connecting chamber available? | | | | above ground. |
| Alternatively, dirty water can be piped to a sump | | | | The easiest designs to construct are generally formal. |
| from where it can be pumped to a sewer or around | | | | They may be in or partly above the ground and |
| the garden for the benefit of the plants (it acts as a | | | | because they are rectangular boxes, it is easy to |
| fertilizer). | | | | calculate the approximate volume or water they will |
| As water meters become more widespread, the | | | | hold before you start the excavation work. |
| efficient use of water, a valuable world resource, is | | | | Vertical block work walls can be fiber glassed or you |
| paramount. The ability to feed pond bottom water | | | | can drop a box welded, butyl rubber liner into a |
| to both filter and waste is a most important part of | | | | properly prepared hole. Fiber glass lining is relatively |
| good pond design. | | | | easy to use in a formal pond design. |
| A koi pond clearly demands careful and extensive | | | | A recent introduced product in the garden pond liner |
| preparation. Bear in mind that digging trenches for | | | | market is medium density polyethylene, which can be |
| electricity cable, gas, water and sewage pipes may | | | | welded to the right shape on site for convenience. |
| mean destroying too much of the existing garden | | | | Choose a thickness to suit the stresses involved. |