How Do You Install a Pond Drain

Pick a corner or edge near the lowest spot, dig a very small hole so you can access the underside (you shouldn’t need to dig a hole any larger than 6x6x6), poke a hole in the liner to drain that lingering water out, and enlarge that hole to install your drain.

Do you need a bottom drain in a pond?

it is possible to have koi in a pond without a bottom drain. The biggest issue is fish load – 3 koi may be fine in 1500 gallons, but you’d be pushing the limit. Good filtration is a big part of the equation, and that includes plants and good algae growth. If you can achieve that, you’d be fine.

What size bottom drain do I need for my pond?

It is generally accepted that 4 inch bottom drains are a must and should be fitted to all ponds under construction, those being modified, or alterations such as fitting a new fish safe, 45 mil EPDM Pond Gard liner.