nitrofish1;2114765; said:
how many koi would stock good into a tank that was around 100 Gallons, judging by if the tank is around 5 feet long?
Obviously, depends on the size of the koi

and the filtration, six 3" koi could grow out till next summer in it with a good W/D just fine.
nitrofish1;2114831; said:
ok quick question here, may fall under the pond forum but since were talking, if i put a pond in my garage, and it falls below freezing, do i have to have like a space heater so the garage doesnt fall below freezing? cuz dont koi still live in water during winter that is close to freezing or would a pond heater be the ticket?
i mean keeping room temp above freezing or keeping pond at a normal temp?
Heating the room keeps temps more stable, but you should still insulate the pond, especially double on the bottom as the concrete will absorb a lot of heat. 4" of Styrofoam (two 2" sheets) for the bottom and wrap the pond with fiberglass insulation (don't let it get wet!). Boxing in the sides will help a lot too.
Don't forget a full cover (sheet Styrofoam is great for this).
Aerate the water, that's an easy one.
Filtration... Biological filtration dies around 55*F so if your having a filter on it at low temps make it mechanical and do water changes (match water temp and remove chlorine
before adding the water to the pond) to keep the bad stuff low.
And as soon as the ground thaws, start digging that new pond

(well maybe you got a couple of years).
In ground ponds should be a couple feet below the frost line in
your area (contact your local agricultural extension office to find out what it is).
Keep us posted,
Dr Joe
.