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Hold My Rod
PostPosted: Mar 23rd, '13, 13:31 
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Joined: Mar 16th, '13, 14:10
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Location: Eastern Cape, South Africa
Hey All

Is there an advisable stocking density for my fish tank which would then not require a power back-up system? In other words is there a calculation or something for ascertaining oxygen consumption of fish per hour etc?
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RupertofOZ
PostPosted: Mar 23rd, '13, 13:40 
Hold My Rod wrote:
In other words is there a calculation or something for ascertaining oxygen consumption of fish per hour etc?

It would vary from species to species.... Tilapia are low DO tolerant.... Trout on the other hand have a high DO requirement...

And then... DO solubility... is a function of altitude... and temperature...

You'd have to start by measuring the DO levels in your system over a period of time... then select the data for your species.... to ascertain the number of fish that your passive aeration can support...
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Ron De Reuck
PostPosted: Mar 27th, '13, 20:42 
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Joined: Mar 13th, '13, 16:13
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Location: South Africa. George
Hi
Were in the east cape as I am in George in S/Cape.
Ron
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RupertofOZ
PostPosted: Mar 27th, '13, 20:55 
Welcome Ron... there's been a few of your fellow countrymen surfacing lately....
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Ron De Reuck
PostPosted: Mar 27th, '13, 21:07 
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Joined: Mar 13th, '13, 16:13
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Location: South Africa. George
Hi
Yip seen it, not a lot of us in S/Africa doing AP that I know of. Also new to it and trying to get systems to work.
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RupertofOZ
PostPosted: Mar 27th, '13, 21:11 
Anyone of you peeps over there heard of, or from "Synaptoman"....
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Ron De Reuck
PostPosted: Mar 27th, '13, 21:20 
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Joined: Mar 13th, '13, 16:13
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Location: South Africa. George
He use to be in this erea but packed it in and moved to capetown I think.
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Hold My Rod
PostPosted: Mar 28th, '13, 13:51 
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Joined: Mar 16th, '13, 14:10
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Location: Eastern Cape, South Africa
Hi there Ron

What system are you running?
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Ron De Reuck
PostPosted: Mar 28th, '13, 17:49 
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Location: South Africa. George
Hi


System = 2 x IBC 1000L. FT(connected with 5o fish). 2x 250L GB (f+drain). 8x 350mm/half PVC 6m pipes (4x NFT. 4x f+drain)

All is in a greenhouse (12m x6m). I tryed to load some pic's...... Still trying! Hope to load them the weekend.

Were in the E/Cape you from.
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Hold My Rod
PostPosted: Mar 30th, '13, 18:49 
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Location: Eastern Cape, South Africa
St Francis Bay. How those pic's coming?
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Ron De Reuck
PostPosted: Apr 4th, '13, 00:40 
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Trying to load them but........ Must be a something that I am doing wrong because it is not working. Mabe it's because I am trying to do it on my Blackberry.
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Brian Fanner
PostPosted: Apr 5th, '13, 02:50 
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Location: Cape Town South Africa
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Hey fellow South Africans! Always good to hear about more of you getting up and running! If I pass by there sometime I'll look you up.
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Ron De Reuck
PostPosted: Apr 7th, '13, 23:44 
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Hi

Think I solved the prob.


Attachments:
Fish%20tanks.jpg
Fish%20tanks.jpg [ 77.67 KiB | Viewed 1449 times ]
Growbeds.jpg
Growbeds.jpg [ 62.56 KiB | Viewed 1449 times ]
Pipe%20Growbeds%20+%20NFT.jpg
Pipe%20Growbeds%20+%20NFT.jpg [ 84.34 KiB | Viewed 1449 times ]
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dancinhrblady
PostPosted: Apr 8th, '13, 03:05 
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I really like your use of the drain pipes... dare I ask how you ripped 'em? Band saw? Either way, tres chic.

lots of space, stack able, in time... It looks great.
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Hold My Rod
PostPosted: Apr 8th, '13, 13:31 
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Location: Eastern Cape, South Africa
Another obstacle has 'arrived' for me to face...

The coffee shop (which I get my electricity from) next door to the field i'm renting has closed its doors. This means sometime soon the chap will need to close his electricity account = no more power!!!

What to do? Any affordable 'off the grid' solutions?
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