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 Post subject: New pool conversion
PostPosted: Jun 1st, '18, 23:10 
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Hi,

I am embarking on a new system after having moved house.

We've moved further north to northern NSW.

We have an a aboveground pool which I am intending to convert to a fish tank/pond.

Does anyone have much experience with this? I haven't found a heap of info out there.

Interested in thoughts on possible toxisity of pool liner?

How one calculates growbed requirements and or if it matters if the volume of water is so large? I'm not certain but it's about 40000l.

Thinking of 250 silver perch?

Does this sound ok or too much?

I'd really just welcome any input on the idea and gotchas that people can think of?

Should I run the pool pump (a sand filter) from time to time if the numbers start to look out of range? Etc etc.

Finally thoughts on fish selection for northern NSW? Silvers or Jade?


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 Post subject: Re: New pool conversion
PostPosted: Jun 2nd, '18, 06:40 
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I'm pretty sure there's a thread on this forum with lots of relevant info. Someone with an inground pool, though I think they were in Adelaide or somewhere else well south. I can do a search later if you can't find it.

You may already know, but you'll need lots of or very large growbeds.

Not sure how far north you are. I'm just north of Ballina. I agree that perch are the best option up here.

Murray cod are a challenge, as set out in one of my threads. Too warm for trout unless lots of chilling. I have a mate who has barramundi. But the required heating doesn't help his electricity bill or green credentials.

Silver perch are bullet proof. But slow growing.

Jade Perch do very well. Not much growth in winter but they make up for it in the rest of the year. My water is down to 11 C right now. I've read that this is below their temperature range. But mine have survived that repeatedly... swimming around the tank looking fine as I send this.

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 Post subject: Re: New pool conversion
PostPosted: Jun 2nd, '18, 09:02 
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Check out "Slowboat's pool to pond conversion" thread. Not active for a little while but 458 posts on there so no doubt lots of good info.

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 Post subject: Re: New pool conversion
PostPosted: Jun 2nd, '18, 09:45 
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This is a great place to start..

viewtopic.php?f=18&t=4396

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 Post subject: Re: New pool conversion
PostPosted: Jun 2nd, '18, 17:25 
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I guess you don't necessarily have to fill the pool , link is a tank volume calculator

http://www.ifocas.org/calculator.htm

Go have a look a PLJs thread big tank

viewtopic.php?f=18&t=12883

40000L for a 1 to1 ratio about 50 IBCs cut in half

100 growbeds 450mm deep should do the trick should keep you busy

Say 30000L wet gravel 1200 fish

All jokes aside just base your fish numbers on your filtration capacity (20 to 25L of wet gravel per fish)

You will have considerable surface area through out the pool to carry nitrification bacteria

So what ever scale you think you can manage should guide you on system size

Biggest problem with these pools would be running a pump big enough is just too costly

So I would imagine there would be vacuuming ect to clean up fish waste

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 Post subject: Re: New pool conversion
PostPosted: Jun 3rd, '18, 14:30 
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Thanks! This is a long but well worth it read.


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 Post subject: Re: New pool conversion
PostPosted: Jun 3rd, '18, 14:33 
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Another load and very interesting thread. It’s giving me lots of ideas. Now I need to do some more designing.


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