Big Coolwater Tank

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justflow1983

Feeder Fish
Jan 29, 2009
2
0
0
Dublin
This isn't necessarily going to be monsterfish; I may actually go the other way and put in like 2,000 white clouds!

So a client of mine wants a fish tank in the display room for their "living machine." A living machine is a system that recycles wastewater from a building into clean water for non-potable uses. The water that comes out is potable but the health people won't let you use it for that. The project is in a sustainable apartment co-op in Ireland.

Below is what he's asking for. I have a good sense of what I'd do but I'm going to not let my ideas get in the way of other people's good suggestions. The size he's looking for is about 6'7 long, 6'7 tall, and 30" wide, which I'll recommend that they make much less tall and somewhat longer.

Here's his request:

One proposal is to put a fish tank in the visitor floor of the LM area.

Tank to contain goldfish and koy/coy/coi? carp. Not tropical fish.

Tank possibly something like 2000h x 2000l x 750w, which makes it mostly vertical. Fish might not like that, so find out if prefer horizontal tank.

Find out what temp they'd like (each species).

Find out what light levels they'd like - ie near window or not?

Anything else fish like/dislike in terms of oxigination. We could probably have a constant flow of fresh water through tank. How often do they want a complete water change?

How often do they need food? What's longest REGULAR interval they can go for food - ie can someone just put some food in once a week, every week...or is it a case of they could occasionally only get food once a week, but if that was regular they'd die.


Let the good ideas roll!
 
I don't think any fish do well on once a week feedings, but plenty will do fine on a two-to-three-times per week schedule, with occasional longer fasts. Big fish deal with this kind of schedule better than small fish. If it were me I would stock it with perch, tench, ide, bitterling, wild-type carp, etc. Those fish all do fine at ambient temp and I think will all eat processed pellets.

A horizontal tank is definitely better for the fish, and is also less expensive to construct; a tall tank requires very thick glass.

Lighting is really just whatever is best for the viewers; fancy lights are only needed if you have live plants. If it is a flow-through tank then water changes are unnecessary. Oxygenation- the more the better. You don't have to use aeration; disturbing the surface with the water inflow will oxygenate the water as well.
 
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