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About vkn

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    Senior Member
  • Birthday 10/23/69

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  • Biography
    We focus on Aquaponics in India!
  • Interests
    Commercial Aquaponics

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    Nanniode, India

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  1. Mike/Ande, I know this is a late response but then if I were to choose, I would take 20% of #12, 60% #18, 20% of #35 and then mix it thoroughly. I am not saying that some other particle size distribution will not work. This arrangement really is helping in lateral water movement.
  2. I am sorry Ande. Not done yet. I have several video clips.. will collate one for you.
  3. We had gone live on this new project recently. Here is a Live video, FYI. https://www.facebook.com/vk.narayanan/videos/10154493130267091/
  4. Thought you might like this panoramic photo of 'circle of life' project @ Honeyland Aquaponics Sholinganallur, Chennai. This is what we could complete in about 10 days and where we are as of today. Click/zoom to enlarge and move around.
  5. Aufin, Neem oil seems to be a good choice in managing nematodes. Let us know how your trials went. I have been using it as a diluted foliar spray for various pests as a general purpose insecticide, miticide, fungicide, etc. Even if it drips a bit in the sand beds, there are no adverse effects seen for most all fish. Some fish like climbing perch were found sensitive to it and we saw some mortality. There could be other reasons for that episode though. I forgot to say you can also use Marigolds (Tagetes spp) as a companion plant. They are known to repel/suppress/reduce soil nematodes naturally. Planting them densely before two months of introducing host plants such as tomatoes is another option.
  6. Are you sure they are nematodes? I have not observed any nematode infestations in our sand culture yet. However, I am asking the operators to closely examine the plants especially those growing in older beds to look out for yellowing of leaves, smaller leaves, less yields, stunted growth, etc. They may have come through infested sand (river/beach sand), nursery saplings (used directly without removing potting mix), or soil attached to tools used elsewhere, etc. Sanitation is important. One of the many reasons, I use gravel in the pathways as mulch to the soil surface around the beds and not allow any visitors to step on the bed walls (seen people doing it), etc. Management of it organically is quite difficult in soil culture as nematodes spread everywhere easily. Soil farmers try to reduce infestations by fallowing, crop rotation (not very effective), soil solarization, etc. You may want to try solarization in your sand beds. One way to do it is to moisten the bed and cover it with a translucent plastic tarp for about 6 weeks during hot summer. This would kill all your nematodes. I am sure there are better/quicker ways to tackle your situation. What do others think? 'Circle of Life' project is shaping up well and we are equally excited in seeing its go live in about 2 weeks from now. Good news is it is going to be all sand culture/iAVs. No other growing techniques are deployed here. I will update the status.
  7. We are currently busy working on these projects L and N, Honeyland Aquaponics ("circle of life" school project) in 700 m2 and Coimbatore Aquaponics (a village scale owner/operated project) in 160 m2. Here are some update pictures from those sites.
  8. Here is another group of family farmers that took up aquaponics recently. I guess it is |project M', will confirm later. It is a self-providing domestic unit in about 101 m2. Two species of fish will co-exist here, red-bellied pacu and monosex nile tilapia. Anything else you want to know, please just ask and I will try elaborating.
  9. This is for you, Mark! Tomatoes in aquaponics sand culture These pictures are from the latest replicated on-farm research and yield trial being conducted at NARDC, Nanniode.
  10. Sorry Matt.. I had to put this on hold for some time due to other pressing activities and unforeseen travels. I will come back reporting when we make progress on this.
  11. Some milkies, oysters and button mushrooms for starters. The 3 filters I am trialing this have earthworms in them and one is without worms. These sand filters have a lot of bio-load from decaying pea and tomato roots that couldn't be removed easily. I am waiting for several lab results to ascertain what I have and what not in these matured sand filter media.
  12. Have a look at this too.. http://www.cngfarming.org/aquaponics And here.. https://certified.naturallygrown.org/documents/AP_Allowed_Prohibited.pdf In their draft aquaponics standards, EPDM liners (ethylene propylene diene monomer) *discouraged.
  13. Aquaponics Family Farmers Association We are in the planning stage of our AFFA online forum. We want this knowledge sharing platform to serve you well. It needs to be relevant to your interests and needs. Please let us know what you wish to learn about aquaponics ways of growing own food, gardening, raising livestock, village-scale aquaponics, commercial aquaponics, and a self sufficient way of life. Other focal areas would be aquaculture, hydroponics, bioponics, permaculture, etc. AFFA will be comprised of Institutional and Individual members from all over the world. No professional qualifications are required for any of the membership categories – simply an interest to participate in the development of sustainable aquaponics. Membership categories: Institutional life membership, Government Institutional life membership, NGO Institutional life membership, School Individual life membership Individual life membership, retired civilians Individual life membership, retired soldiers Individual half-yearly membership AFFA membership fees: to be finalized. FAHC (feedahungrychild.org) The AFFA membership fees are made directly to FAHC bank account as an endowment fund. FAHC will use the accrued interest of this modest fund to support the trust's feeding programs and to increase the reach of the NGO by creating jobs and training opportunities in the fields of aquaponics, RAS, hydroponics, permaculture, etc., to disseminate information, to educate the community, or reinvested to build the endowment. Some of the benefits of AFFA membership would be as follows: Up-to-date aquaponics-related information and networking opportunities Access to NARDCs aquaponics research outcomes and knowledge/experience repository Ongoing mentoring support Access to the archive of most vital scientific journals (relevant research papers, short communications, fact sheets, technical/field notes, etc.) Reduced registration to future AFFA conferences Reduced registration to future AFFA workshops and online training events FAHC News, including general assembly information (minutes of latest meetings), audited financial results, details of beneficiary activities and others Access to AFFAs quarterly newsletter An opportunity for members to submit articles in the AFFA magazine We welcome you to be its founding members and would love your input..
  14. Mycofiltration, mycoremediation, or simply to say mushrooms in aquaponics sand culture Spawns for our first mushroom trial in sand filters will arrive in a few days. Please feel free to share your thoughts.
  15. I guess it first appeared at Aquaculture Hub forum some time in 2013.. From there upon request I also received a copy of this via email directly from Mr. Bevan Suits. Anyone knows how he is doing these days?