Mark i

Bstro,

One problem that I can see with putting two drains in but only having one connected, is that you will get a build up of c**p in it which will cause health problems for your koi unless you flush it regularly. As RDH said the flow when both drains, are running will be reduced through each one which could affect the transport of solids to your filters and deposit it in the pipe.
I have 5500gals with only one bottom drain, there is a good flow through it and the pond is clear.

Regards Mark

bstro747

yes i agree mark so will be installing just one, i rang avenue fisheries about the bottom drain you sugested. £109 posted so i may have to investing in one

bstro747

sorry mark i mean/ mark1fan sugested the drain,

Mark i

It was the other mark that recommended avenue's one, i'm a spindrifter man

Regards Mark

markf1fan

nice one mate, you will be happy with it i can asure you. have pm you.

__________________
1x 2400 gallon pond
1x estro sieve
1x econo bead filter
1x bakki shower with crystal bio
1x 55w pro clear uv
1x eco 12,000
1x sequence 15,000
1x hi blow 40 air pump
and some really nice koi