Garden AQUARIUM Project? Filter Question
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Old 11-25-2014, 11:21 AM   #1
Holbrows
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Garden AQUARIUM Project? Filter Question


So I've got my hands on a 6ft x 3ft x 3ft aquarium.
I'm thinking of a garden project as the size has restricted indoor use. I was thinking of putting some small goldfish and koi (I work for an aquatic retailers with a pond holding 300+ koi so I can shift them when size is too big). What my issues will be is filtering/airation.

I was thinking that the size of the tank is too small for a pond filter, what if I used a large internal aquarium filter (800LPH+), possibly two, and using a small pond pump to shift the water around. I'm trying to be as energy efficient as possible as controlling 30+ tanks in my fish room as well as a full on pond with UV sterilisers etc would bump my monthly electric bill up a ton.

Any feedback would be a great help

Last edited by Holbrows; 11-25-2014 at 11:21 AM.. Reason: Damn you autocorrect
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Old 12-03-2014, 02:43 AM   #2
Diana
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Well, 400 (American) gallons (333 Imperial gallons) sure puts it into the 'pond' size for filters and such.
Would you want to go further in that direction?
Drain the water via gravity to a long narrow channel.
Plant the channel with emersed aquatic plants.
At the end of the channel have the sponges or whatever other media you want (or need) to keep the pump clean.
Pump the water back into the tank.

This creates more interest in the garden, too. The channel could be part of a patio or deck area, could be worked into a bridge over a path concept, or even an aquaponic vegetable set up.

The basic idea is this:
Golds and Koi are very hard on plants.
Plants are a natural and very efficient filter.
By routing the water through a shallow (perhaps 12" deep) channel you can grow plants that get their CO2 from the air, so are more efficient than underwater plants at removing all the things we want removed from the water.

The catch is this: What will grow there in the winter? Will it freeze? The fish are not very active in the winter, so there is not really much waste, so maybe the channel could be shut down then, plants (kept in pots) moved to a place that does not freeze, but where they can be dormant.

Related question:
An aquarium kept outdoors through the winter will get a lot colder than the same volume of water that is in the ground. Will the fish be OK?
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aqurium, garden, koi, pond, pump

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