How many gallons in my pond?

Question

I have a pond w/ waterfall in my backyard, it came w/ the house. It's about 5.5'x11' and 20" deep. How many gallons will it hold?
I want to make it a Koi pond and need the proper sized bio filter. Any other ideas for a Koi pond??? thanks Yahoo kin.

Answer 1

As for ideas, you could always make a moat, everybody loves moats.. Either a partial or full moat around 1 foot wide and deep so you can still step over it, with a bridge for the front and back doors. If you make long passageways very deep compared to it's surface area then the fish won't get enough oxygen and they might not want to go there. Plants are good for oxygenating the water.

As for the driveway? Better keep it closed, the oils and antifreeze and crap can't be good for the fish, make a few inch high berm around the driveway so that the car oils and crap can't runnoff into the ponds when it rains. Maybe you can install a pipe under the driveway. Make sure it's deep enough so the ground and pipe under it can take the weight of the car as it drives over.

Don't fill it with tap water, chlorine is bad for fish, at least tap water has to stand for 24 hours before fish go in.


So try to make the ponds rain-sufficient. If the area isn't very wet then shallow areas might dry out in the summer, the deeper and the larger the ponds the the more of a reservoir is available if it doesn't rain for a while.

A many-lobed shape like the Central Park one at 59 St looks really nice.

Or you could have several connected ponds, one above the waterfall if possible?

Answer 2

754.285714285714285714285714285714 gallons
I think a pond is an excellent idea for Koi fish. I would be happier than a Koi fish in a pond, if I was one of your Koi fish. And I would be royal Koi fish with a waterfall. Well, now you got me wishing I was one of your Koi fish.
You don't need much of a filter, Koi will keep the algae down and the mosquito larvae too. Mmmm mosquito larvae!....with a side salad of algae! When is it going to be ready?
You are very welcome Yahoo kin.

Answer 3

if the pond was like a swimming pool - rectangular cross section - it would be 100.8 cubic feet, which is 754 gallons. But it's probably got a bed that gradually slopes from the edge to the deepest part. So I would guestimate it holds 550 to 600 gallons.

Answer 4

If we assume your pond is a rectangular "box" hole, then you have rectangular hole dimensions of 66 inches x 132 x 20. Using 231 cubic inches per gallon (which is rounded to nearest unit) you get

(66 x 132 x 20) / 231 = 754 gallons

Answer 5

Multiply the three dimensions of the pond (expressed in feet) to get the volume in cubic feet. There are 8.33 gallons per cubic foot.

Answer 6

20" = 1.67' so the volume is 5.5*11*1.67=101 cubic feet.

1 cubic foot = 7.4805 gallons, so your pond is about 755.5 gallons.