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| Fish stocking rule of thumb. http://byap.backyardmagazines.com/forum/viewtopic.php?f=2&t=8385 |
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| Author: | Keriaf [ Oct 18th, '10, 21:56 ] |
| Post subject: | Fish stocking rule of thumb. |
Hi I was wondering I have just watched Murray Hallam's Easy Aquaponics DVD and he said that as a rule of thumb the fish stocking can be 1 fish per 10 litres of water. I have an IBC tank using the CHOP system with one half of a 200L blue barrel cut lengthways for the growbed and another cut horizontaly for the sump. I am thinking of expanding to at least 4 or 5 half barrels for growbeds before I get any fish. According to the rule i could have 100 fish but I want to half that because it is a new setup but in the DVD he said it is good to have a 1:1 ratio of growbed volume to fishtank. Does the rule of thumb only apply if you have a 1:1 ratio? If I had 5 barrel half that would be 500L in volume of growbed so the ratio would only be 1:2 which I doubt is enough if I added 50 fish. I was thinking is I added 25 fish with 5 barrel growbeds because I only have half the ratio so maybe half the fish? Any thoughts, comments, or queries will be acknowledged. Still in development stage but just thinking about the future. |
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| Author: | earthbound [ Oct 18th, '10, 22:22 ] |
| Post subject: | Re: Fish stocking rule of thumb. |
Hi Keriaf, thats a little heavy at those rates I think. Try reading through this thread, these figures are a bit safer. viewtopic.php?f=12&t=6646 |
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| Author: | RupertofOZ [ Oct 18th, '10, 22:58 ] |
| Post subject: | Re: Fish stocking rule of thumb. |
I think you'll find that Murray has now modified suggested stocking rates to be more like 30kg of fish per 1000L... or 3kg/100L.... with a minimum of a 1:1 fish tank to growbed ratio... A 1:1 ratio.... is the bare minimum... anything less and you must stock to your filtration capacity... which is generally your growbed capacity... With a total of 6 half barrels... you would have about 600L of filtration.... so a max of 20 fish at 1kg... Or IF, and I stress "if" you genuinely are going to start eating your fish REGULARLY at around 500gm... you could perhaps double that.... But in a new system... I would suggest you start with 30 fish max... |
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| Author: | gemmell [ Oct 19th, '10, 06:19 ] |
| Post subject: | Re: Fish stocking rule of thumb. |
I had a question about where that rule of thumb (3kg / 100L) came from. Is that something scientific? Or something the AP community has worked out via personal experiences? |
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| Author: | Keriaf [ Oct 19th, '10, 07:50 ] |
| Post subject: | Re: Fish stocking rule of thumb. |
Thank you to all contributors, it has cleaned up my questions. Thanks to all for the very quick replies. |
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