RupertofOZ

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About RupertofOZ

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    Senior Member

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  • Location
    Gerringong

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  • Interests
    Aquaponics

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  1. Producing a biofuel from old rubber tyres that can run turbo-charged diesel engines while reducing emissions by 30 per cent. http://www.abc.net.au/news/2016-11-28/new-life-for-old-tyres-as-biofuel/8064350
  2. Oh, the irony
  3. I've seen several mentions relating to " Boone More's results were much better if you compare the research ratio studies of Mark's and results of Boone's commercial work" Can you point me to links to Boone's trial data papers please
  4. So the stocking density never really exceeded 20kg/m3.... is this the suggested limit for the 1:2 suggested ratio?? I'm still not sure what the "optimum fish tank volume to sand bio-filter ratio is 1:2" suggestion is based on, or where it was derived from...???
  5. What is this "optimum" ratio based upon..... an associated suggested maximum density??? If so...and/or... what is the suggested maximum stocking density associated with this recommended ratio??
  6. I think their intentions go beyond that Dave... As to the patent, or anyone that might receive a letter claiming they might be "copying" the N&P system..... I think any such recipient should merely respond... " "no sorry, we designed our system based on a design that pre dates your patent application".... And send them the link below which documents and illustrates Joel Malcoms "commercial trial" in 2009.. with specific reference as to "mineralisation"... http://www.backyardaquaponics.com/forum/viewtopic.php?p=181136&sid=f7bf5556341d1c6608539fda4520b20a#p181136
  7. Seems somehow Nelson & Pade have been granted two patents on the "procedures of aquaponics". Not systems or designs but the concepts. They are now sending out letters demanding companies that make/sell systems to cease. http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8677686.PN.&OS=PN%2F8677686&RS=PN%2F8677686 http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9232702.PN.&OS=PN%2F9232702&RS=PN%2F9232702 Get ready to have your arses sued everyone....
  8. I can't understand why anyone would contemplate stocking fish in the 100L tank.. when they have a 1000L tank...
  9. 0kg/m3/yr.... There appears to be no filtration in the system.. so it's almost certain that the fish would die well within a year...
  10. Direct link to PDF download http://www.fao.org/3/e46b3cd1-2bd1-4b90-9bea-af856a75bb03/i4021e.pdf
  11. Gary, I'm confused by this statement... isn't that exactly what an iAVS system does, and is predicated upon.... the addition of organic matter, fish poop, plant roots etc... and the subsequent development of "soil web" type microbiologies?? Doesn't your statement infer that there is a limitation to the loading of an iAVS grow bed.. which if exceeded would both clog the sand media, and potentially compromise both the micro-biologies and chemistries of the grow bed.... to the point of development of anaerobic zones. compromised plant production.... (like all media beds)...?? Does your statement infer that iAVS sand beds do have a limited lifespan and ultimately require turning and a period of "fallow" resting... or removal of the media for cleaning.. or replacement...(as was the norm in sand bed hydroponic system implementations)?? Has this potential loading limitation been quantified, or service lifetime of the beds been determined.... or can it be "identified" by an operator..?? Is any such organic loading limitation related to the sand type selection.. ??
  12. I base my opinions on available data... and there simply isn't any data available to support your conjecture that I am aware of... By all means please enlighten me... Seriously, if the feeds being produced in Australia for Australian species were as deficient as you seem to be implying... Then the issue would be occurring throughout the industry.. and widely known.... Both the DPI, fisheries, hatcheries and grow out farms would all not only be aware of the problem.. but ALL would have a vested interest in acknowledging it and doing something about it.... Sorry, but I'm calling bullocks unless you can/are prepared to point to any evidence that supports your claim As above... the "problem" would be widely known, and reported through out the industry.. it is not.... I presume by "seedstock" you are actually referring to brood stock.... No hatchery would maintain a genetic line in their brood stock that had any such deformities... and any nutritionally induced deformities would have resulted in the fish being culled before they even reached breeding age.... Perhaps your listed experience and expertise is some what exaggerated.. This is simply NOT true.... there have been many decades of research done with regards the nutritional requirements of most commercial species in Australia.. and even some esoteric species... both by government research institutions and aquaculture feed companies As an example Stuart Rowland spent a decade or more specifically researching the nutritional needs of Silver Perch... and that research underpins the entire Silver Perch industry The same goes for Barramundi and Jade Perch, both now thriving industry species exported to other countries.... the Salmon & Trout industries.... Kingfish, Tuna, Mullaway... and Silver Perch & Murray Cod....
  13. I don't believe that there's any such systemic problem in Australian produced aquaculture feeds... either by any supporting data, or even anecdotal inferences There was an instance of deformities reported in relation to a batch of imported feed supplied by a company formally known as "Growbest" several years ago... which resulted in them changing their overseas supplier, as they have subsequently done several times since But to my knowledge there is no data to support such a claim against the feeds manufactured and used by the majority of the Australian aquaculture industry from either the Skreetings or Ridleys feed manufacturing companies...
  14. Probably not in an AP system.... there's plenty of research in wastewater treatment that shows that oyster shells in trickle towers binds phosphorus to calcium.. (that's precisely why they researched their use )