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Showing content with the highest reputation since 09/20/2019 in all areas

  1. 2 points

    Nitrate Reduction

    This instruction video isn't correct. The fishfood should cover the needs of the fish as accurate as possible. Shifting to a lower protein diet (sub-optimal) is going to result in more waste, lower food utilization % (higher FCR), and maybe even compromised fish health, thus this makes no sense to me. IMO better would be lower total feed load, less fish or more plants and/ or secondary nitrate removal. Water replace, dnf etc.. Btw if you stop feeding the organic waste in your system will still be broken down slowly, further bacteria mass will go down too, again with the release of nitrate, thus there can be a long delay in reduction of nitrate production after reducing input.
  2. 2 points
    Hi again Hunter Pehrson Here is 2 links on the matter, you will see that the "ideal" varies a lot, depending on fish species tolerance to ph swings https://thefishsite.com/articles/water-quality-a-priority-for-successful-aquaculture https://www.dpi.nsw.gov.au/fishing/aquaculture/publications/water-quality-management/monitoring-alkalinity-and-hardness I just uploaded a pdf on your Q to the download section as well, since links seems to have a limited shelf life Keep in mind that fish husbandry is just the same in aquaponics, as it is in aquaculture cheers
  3. 2 points


    Hi Hunterpehrson Welcome to APN/HQ To answer your Q on alkalinity, I find it easier to point you towards a thread/post and a APN article where the complexity are pretty well explained IMO Quote : Here are the most common scenarios you will encounter that require adjustments: Declining pH - Generally speaking, you will want to maintain your cycled system pH around 6.8-7.2. If it falls below this range, the nitrifying bacteria will be adversely impacted. You need to add a base. There are commercially available products for this, but you can also use relatively common chemical salts like sodium bicarbonate, calcium bicarbonate, potassium bicarbonate, calcium hydroxide, calcium chloride and many others. Specific recommendations are beyond the scope of this article, but will be featured in a later article related to maintaining pH levels....................... cut/paste from this article : I recommend you read all the answers in the post and the full article cheers Edit: I'll add this link here as well: cheers
  4. 1 point

    The transition from IAVS to IAS

    Hi VKN Greetings to you as well. I would like to hear/see your developments cheers
  5. 1 point

    Bigdaddy's iAVs

    Hi everyone, Some more pics of my new backyard setup. All grass and dirt up and out, road base in, reo mesh and storm water set up ready for concreting. Concrete down, channel drains down, vibrator in ready to compact the base. 600 x 600 x 30 granite pavers going down. A snapshot of how my back and side corner will look with the fake grass down. I can put my fish tank and grow bed here with a nice drain built in to the set up if I wish. Chanel drains up and out and granite going all the way to the back fence, a much better look. Cheers.
  6. 1 point

    Bigdaddy's iAVs

    Hi everyone, I have started my iVAs with on a completely blank canvas. I thought I'd post my journey in some sort of chronicle order and maybe give some ideas for those who may be thinking about a system and/or for those who already have systems. I feel good planning is the key to building. I have spent many hours thinking sketching measuring and using whatever else I have at my disposal. My aim is to build and run the most efficient, productive system I can, making the beat use use of the space I have. I have several challenges. Below is a list which is not conclusive. I can break down these items to further explain but will not for now. Cost Looks Very small backyard Suburban living Weather Maintenance Time My backyard measures 4.8 metres by 5.0 metres Here are some pics from the the start. The original side with my beloved citrus trees with the left side 2 sitting on the slab where my air conditioner originally was. My new pergola. The original rainwater tank New slimline rainwater tank and system ready to be re plumbed and reinstalled. Air conditioner and rainwater tank installed around the side out of the way where noise and size will be minimized. My original line of thinking about a small iAVs system. Another view of my original backyard, this time to the back fence with the back garden removed. A more current view of pic 1, backyard opened up with all the screening up and roof addition to pergola. More to come. Cheers.
  7. 1 point

    Hello from Ithaca

    Thanks! I was experiencing an ammonia spike, which was because I was way overfeeding my fish. Stupid mistake - I misunderstood how much they needed, and I was confused because it took a while for the overfeeding to result in the spike, so it coincided with the installation of my aquaponic media bed. Now it's going great! I've been harvesting basil and lettuce from my grow bed regularly, the water is clean, and my fish are healthy.
  8. 1 point

    Food Colouring

    Interesting article. Cheers.
  9. 1 point
    Hi everyone, Just got my first bill since installing the battery and signing up to a VPP plan...Very pleasantly surprised... I got a credit of 370 dollars plus for a 38 day billing cycle which includes a 150 dollar welcome credit because I'm in the RAA and 25 days of a $5.00 per day payback because of the VPP. This credit will definitely help with the expected increased power bills over winter. The litnus test in the winter months is still to come. So far so good. Cheers.
  10. 1 point
    Hi folks, In South Australia we have some of the most expensive electricity in the world with most people earning on or just above minimum income and our many pensioners living below the poverty line so paying for electricity is fast or has become a major concern for many. Our state no longer has enough of it's own power generation capabilities to remain continually functional on it's own, this means we have to rely on other states providing electricity for us when we can not produce enough. This is done via what is known as the national power grid, a somewhat complex power sharing infrastructure, in which power is introduced by people who produce more than they require and distributed to those who need it at a cost. The costs vary depending on numerous factors, but in the end, because of our needs, we (us the consumer in S.A.) are left paying a lot of money for electricity. Our climate ranges from mild nasty winters at times to very hot summers at times. We also have a lot of beautiful weather in between. With electricity prices expected to soar yet again, I've decided to invest in some sustainable energy for my home. Over the last 12 - 18 months I've installed solar panels and now, over the last couple of weeks, battery storage for my home. Our States geographical location is ideally suited to solar electricity generation and storage. My house faces South/North which is ideal natural heating and cooling. I also have no shade concerns. All and more are considerations when deciding to go with solar power generation. My previous winter, electricity bill topped around $790.00 per 1/4 or 3 months, compared to (by memory) $340.00 with my solar panels on. My first bill with solar panels on dropped from around $720.00 around $90.00. Now with my battery storage system I am hoping to knock out my power bill and electricity connection cost all together. I am hoping the payback of the whole system will be under 5 years, time will tell I guess. Pic 1: Battery around the back, out of the way, under my solar panel inverter Pic 2: My services out the front. Gas supply underneath, electricity in the middle and battery gateway on top with the NBN connection on the side. Cheers.
  11. 1 point
    I'w never plugged it ? cheers
  12. 1 point

    Rowan berries

    Hi I just had to harvest some rowan berries ( https://en.wikipedia.org/wiki/Rowan ) as the trees are really full of them around here, this year. They are really bitter and need to be frozen before use to release the sugar content . So I washed/cleaned them and got total 2,8kg berries for the freezer. Then I got on the net to find some recipes on how to make rowan jelly more to come cheers
  13. 1 point

    Newbie Questions.

    Hi again Got it, it's a DWC system UVI style built on site. It can be used for either aquaponic or hydroponic so you don't have to use fish to run it. here is a description of what you got https://www.uvi.edu/files/documents/Research_and_Public_Service/WRRI/UVIAquaponicSystem.pdf From the pics it looks like it's nicely built so does the green house. here is some more info https://www.nal.usda.gov/afsic/aquaponics?page=1 https://www.agmrc.org/commodities-products/aquaculture/aquaponics http://factsheets.okstate.edu/documents/srac-5006-economics-of-aquaponics/ I would contact the local agricultural extension office https://extension.wsu.edu have a chat and ask their opinion cheers You might get some pro/con thoughts and ideas by plowing thru this thread
  14. 1 point

    Newbie Questions.

    Hi Gundog Welcome to APN/HQ To answer your Q's, you have to provide more details/pics type of setup "brand-names" etc.also what part(s) of the system is missing (25%) but I'll try to give a "general" answer. Not hard, if you are dedicated and are genuinely interested, experience and/or basic knowledge in either agri- aqua- culture or both would help. Time intensity will vary with "season". Keeping livestock will tie up some time on a daily basis, no matter how much you automat the system. It could be, however it deepens on numerous factors. The upside for you is the $300.000 invested (if it is put in a "good" system you can use?) You have to figure out how much more you need to invest to get it up and running. The cost of the remaining 25% does not necessary mean another $100.000 it could be more/less, pluss the cost of your own training time and fees? Water budget is the most important part, can you get enough ? any restrictions on supply ? Access to market is vital (distances & demands) ,also what can you grow in your climate? indoors/outdoors/heating/cooling/lighting etc.......? Regulations ? restrictions ? on fish species, supply of fish................. the list is long, there are a few threads on the subject worth reading. https://wsg.washington.edu/wacoast/meetings/June-2016/Handout-Overview of State and Federal Aquaculture Requirements.pdf Short answer to both is yes. No such thing as dumb Q's so don't worry cheers
  15. 1 point

    Rowan berries

    Hehe I see I got those pictures in a odd sequence I'll add that before proceeding to make the jelly, I did a test run as I'w never made jelly before. The test badge was made of mint picked in the garden, turned out really nice as well and boosted my confidence to make the rowan jelly cheers
  16. 1 point

    Some iAVS concepts and ideas

    I guess what I'm saying is that, given what sand cand do, we need to get a different perspective on it. It should be more expensive that gravel, lava rock and clay pebbles. Sand can do many things that they can't...so I'd argue that comparing them is futile. I respectfully suggest that your plan ignores how plants grow in soil. There is no question that you could filter the water for a recirculating aquacualture system using sand filters...some of the biggest and most valuable fish collections in the world are protected by sand filters...eg the EPCOT centre...but iAVs is not just about filtering the water....but rather the creation of a mycorrizhae that interacts with the plants to produce the results of which iAVs is capable. There really is only one way to know if your plan is successful. You build a stock standard iAVs...and then you build your planned deviation....and then you measure the performance of both units. Your "need" is predicated on a false perception of the value of sand. If you take a more informed view of sand, that "need" may change.
  17. 1 point
    Hi Hooked, Yes, my winter water temps only drop to 12-15c for a very short period. It is not uncommon practice for those with larger systems to cycle 2 species per year. Warmer water perch, cod or barramundi during summer months and a cooler water fish like trout during winter months. Cheers Toga
  18. 1 point


    Hi Toga They keep fresh for about 4-7 days in a sealed plastic bag in the fridge , and OK for another week. So I fold them up further once they have cooled, I then put them in separate plastic bags (my ex stock 4 in each bag, with a papper between to separate ) in the fridge for further cooling, before pressing out air, sealing and freezing to avoid condense. If I freeze for longer storage, I usually vacuum pack. The trick is to thaw completely and slow in the fridge before unpacking this way they taste just like fresh. Back in the old days they would let them hang to dry then wet/moist them again before use a special technique this way they could be stored for +/- 6 months. Then there is also another variation (flat-bread or flattbrød as we say) you use the same recipe/dough, but you roll them much thinner and you finish up with a special roller that pokes tiny holes in it, to vent out all moist whilst backing it. These are baked slow and on low heat, to dry and get crispy. This way gives about double/triple the number, and you usually need some practice to roll them out this thin. These can be stored for years. Usually both variations would be made at the same time. cheers
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