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grubby

Anyone ever tried a wheelie-bin for a grow-out tub or breeding tub ?

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.As the title says. We upgraded our 200 litre recycling bin to the larger 300 litres. Its just kept round the side of the house and is clean and empty. Thinking of using as a breeding tub, anyone tried this before or is it too deep relative to surface area ?

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probably due to co2 release and o2 intake mdamazing, only happens at surface. not enough surface area to volume can cause suffocation of fish even with airators working.

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On 14 November 2014 at 9:59 AM, cod said:

probably due to co2 release and o2 intake mdamazing, only happens at surface. not enough surface area to volume can cause suffocation of fish even with airators working.

Like you said cod, I was suprised when I learnt that aerators work by disturbing the surface tension allowing the gas exhange at the surface.  Using a pump/filter to create a ripple at the surface does the same thing.

I've read that the bubbles themselves are too small and in the water for too short a time for any meaningful exchange directly.

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The bins are OK for awhile but if they are full full, there's a chance it'll split and leak from the weight of the water (1/4 ton of water in it) ...personal experience lol 

But if its outside that won't matter. If you want to aerate it, you'll need a stronger pump, or you can set up a pipe (40mm) on the inside that runs to wherever above the bottom  as a uplift pipe...but bigger. Various ways to setup to ur liking/needs. 

 

The number of fish in a "tank" depends on the surface area not volume.  For example if you have a tank that's 50x50x50cm and you can put ?10 fish into that comfortably, if that tank is 3 meters tall, you can still only have 10 fish in it. ( this is where decent filtration comes in but we're not talking about that)

The bubbles being small is better,so that bit is wrong, as its easier to dissolve into the watet- co2, but in most of the bubblation with air stones/strips they, in themselves do not oxygenate the water ( maybe 5% at best) its the column of water from the airbubbles going to the surface and disturbing the surface tension where the gas exchange thing happens.

 

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