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About GaryD

  • Rank
    Senior Member

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  • Biography
    I'm a micro-farmer....and the author of The Urban Aquaponics Manual
  • Interests
    Microponics, woodcraft

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  • Location
    Macleay Island, QLD
  1. Hi Ande, I stumbled across this little machine... ...and, this one, too.... ...and then there's this little hand-cranked unit... ...or this beauty.... Ande....a few stocking filler ideas for next Christmas. Gary
  2. Bingo! You nailed it, Ande. Thank you for providing those links.....much appreciated. I was given a small tree and I've planted it...and now I'm looking forward to see it yield these pods/nuts. Gary
  3. How does your sand stack up against the recommendations? If your sand is draining effectively.....and your water is stable at pH 6.5...why are you considering changing? Gary
  4. A lady, who does some casual gardening work for me, gave me this pod yesterday. She didn't know anything about it other than the person who grew it called it an American Nut Tree. On another occasion, she had referred to it as an Asian Nut Tree. I couldn't make any sense out of either name...largely because the number of edible nut trees that grow in the Americas and Asia is huge - and I couldn't find any images that looked like what I had either. This pod is not yet ripe...they go brown when ripe apparently. So, anybody know what it is?
  5. Hi Aswin, Congratulations on your decision to try iAVs. As much as I believe that you'll benefit in a very tangible way from your decision, I applaud your courage in becoming a member of what is still a select group of latter-day pioneers. Most of all, I thank you for your wilingness to share information arising from your experience. While we have assembled a useful parcel of infomation about what has already happened with iAVs, Mark is the first to assert that there is a great deal still to be learned....and people like you, Aufin, VKN....and a growing band of others...are going to play a critical role in building the body of knowledge and evidence that attends iAVs. Gary
  6. There are some burning stubble/crop residues...housing livestock on concrete...the use of chemical fertilisers, herbicides and pesticides (particularly in watersheds)...that probably should be viewed as criminal acts. As long as the global elite are allowed to commoditise food production, they will create barriers to non-industrial food production...and I guess that's what you're concerned about. I share that concern. The time is long overdue for the people to reclaim control over the food chain...and the water that is needed to grow it.
  7. Hi Ande, What amazes me is that iAVs (and the use of sand) eluded us for so long. When it was finally pointed out to me, I can recall thinking that it had been 'hidden in plain sight' the whole time. I've asked myself why I never followed up Mark's work earlier...many times. The only answer that I can come up has to do with the Steve Diver ATTRA article that we all relied on so heavily back in the early days. You can't help feeling, when reading Diver's cameo pieces on the main systems that were around back in 2001 (when the article was first published), that the Speraneos somehow 'improved' on iAVs....when the reverse was the case. The document also incorrectly stated that iAVs employed trickle (drip) irrigation...which is a poor description of what is actually a reciprocating bio-filter on an intermittent irrigation regime. I'm certain that there were people who understood how iAVs worked but were not interested in drawing attention to it...for their own reasons. I'm aware that Mark reached out to Rakocy who was allegedly involved in aquaponics 'research'...and Nelson and Pade...but they never (so it seems) uttered a public word about it. For the rest of us it was probably the assumption that, since it had been overtaken by the Speraneo model (who themselves did little to draw attention to the fact that their 'model' was a direct flop of the key question of media particle size) there was little to be gained from going backwards. I think it suited everybody with a vested interest in those days (early 2000's) for McMurtry to retire broke (financially and physically) to his Montana mountain top. I find myself wondering what might have happened had he been capable of persisting with iAVs back in those days. One thing is certain, the thousands of fish that perished in malfunctioning Speraneo systems would have no doubt been grateful... as would the thousands of impoverished villagers who might have survived longer than they did...and the countless arguments about what was a useful commercial model (and what was not) would have been resolved. We would, in effect, have been 20 years ahead of where we are now. Such is life. Gary
  8. If this article is correct, conventional farming is steadily being overhauled by Agriculture 2.0...the high tech approach to producing milk, meat and cheese.....with not an animal in sight. High tech laboratories are already producing wines that get past the discriminating noses of experts. What's next? The article puts a negative spin on Ag 2.0....but, given the parlous state of the planet, would a reduction in farming necessarily be a bad thing? Your thoughts? Gary
  9. Hi Ande, Seasons Greetings to you. It's currently 300C here.....or 860F for our US your Norwegian Christmas snow scene is stuff of the imagination for us. To all of our members.....a safe and happy festive season to you - and your friends and families. Gary
  10. Hi Stanfel2, Welcome to APN. The Urban Aquaponics Manual will be of some use to a newcomer to aquaponics. Just bear in mind that the current edition is over four years old....and the 4th Edition is long overdue for rollout. I'd also recommend the iAVs site...for information on the integrated aqua-vegeculture system. Gary
  11. Hi OP, Your last post (now hidden) was off-topic, continued to evidence a lack of commitment to sharing information with fellow members and contained the usual disparaging remarks. You, and your students, learned what you know through the efforts of other people. That system only works if the participants play the game properly....and that means (having learned at the feet of others), you are bound (by social convention) to reciprocate. Social recicprocity is a well-understood transactional strategy....and its the underpinning of this site. You can't be forced to share - but, when you make claims - and fail to support those claims with appropriate evidence, it can be assumed that those claims were false. Future posts which do not address the title of this thread will be concealed. Gary
  12. I haven't had time to get the full gist of this post but the mention of snails pricked my interest. If I recall correctly, UVI used 'redear sunfish' or something similar....but I don't what snails they had (or, for that matter, what snails you have)....and they're in a warmer climate. If your snails are like the little white water snails that I've seen in aquaponics systems, they will eventually block pipework, seize your pumps and generally give you a very bad time. These things will devastate a system. My response to this threat would be to drain the system.....and dismantle it sufficiently to be able to clean it as much as practicable....and to declare it dry. Then I'd leave it for at least a week. After that. I'd flood the system to the point where all surfaces are wet.....and add some sodium hypochlorite and recirculate that for several more days. I'd love to be able to use something like assassin snails but I don't believe we have them here....and unless there's a local would probably stay that way. I think the most direct solution is to shut the unit down and clean and disinfect it thoroughly. The white snails to which I referred earlier, breed so prolifically that they just jam the system up...quite literally....and once their numbers mount, it happens very quickly. Gary
  13. So it's OK for your students to borrow from the work of many others without any requirement to respond in kind? That says something about the education that they are are receiving. It's also inconsistent with the spirit of this forum. You made several claims...and the burden of proof for anyone who makes a claim lies with the one who makes the this case, you. If you fail to meet that burden, the claim is unfounded and requires no further argument to dismiss it. Aron Ra says... In other words, If one cannot demonstrate and/or evidence a claim, then they literally do not know what they are talking about (or doing) and should be categorically ignored. To summarise, you made claims which you are unable to evidence. In the time-honoured tradition of Aquaponics HQ/Nation, I'm calling bullsh!t.
  14. You don't have to be much of a fighter to deal with a kangaroo. They are shy relatively shy animals and will usually only become aggressive if cornered or chased (particularly by dogs). There would have been no issue if the dogs had not chased the 'roo. While they are no match for a pack of well-trained hunting dogs, a big buck kangaroo is not defenseless against single dogs. They have exceptionally powerful legs and can kill a dog....particularly if they get a chance to rake the dogs abdomen with the claws on their hind opens the dog up like gutting a rabbit. They will also take to water (in a lagoon or a farm dam) and when the dogs follow them in to the water, they will grab the dog (like in the video) and drown it. I think the 'roo showed commendable restraint in not kicking the bloke's backside.
  15. Hi Early, Hace you considered something like the Jean Pain method? Murray Hallam has just done a video where he buries a heap of plastic water pipe in a large compost heap (contained inside a corrugated water tank). You have to provide an email address to access the video (and a heap of others like it) but it might be worth a look. As the compost heap heats up (begins very quickly and persists for months), he pumps water through it. The temperatures that are produced by this method are quite amazing. Is this a possibility for your location? Gary