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Rahul Sud

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About Rahul Sud

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    I am new to Aquaponics and would like explore the avenues that are available.
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    Mumbai, India

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  1. Thank you much appreciated ..... shall revert........ Soon we are planning to restart a 10000 L fish tank with total 500 sqft grow bed area with NFT, Vertical Towers, DWC and iAV System.................
  2. @ anyone - Do these parameters hold true Inoculate and startup a new aquaponic system : If one just fills the aquaponic system with water and put fish in it, it will start up all by itself. You can’t prevent it from starting up unless you do something really dumb. To start it sooner (so you have vegetables to eat sooner) simply “inoculate” it with some of the nitrifying bacteria that occur naturally in aquaponics water to begin nitrification. We recommend operating your system with 0.3 pounds of fish per square foot of raft area or media bed. However, we suggest starting your system with 10-20% or so of this recommended operating amount of fish. There are two reasons for this: first, it is difficult and/or expensive to just buy a large amount (by weight) of live fish. Second, until your nitrifying bacteria get well established and numerous, you do not want to inject too much ammonia into your system, which is what “too many fish” will do. Ammonia levels of 3 ppm or over in your water will slow down or stop nitrification (and your system startup) in its tracks, because the nitrifying bacteria in your inoculant are inhibited by too much ammonia, even though it’s their “food”. Although there are some nitrifying bacteria present in the water itself, these bacteria are primarily “surface colonizers”, which means that they live in colonies on solid surfaces; this is sometimes called a “biofilm”. There is a limited amount of surface area for them to colonize in your brand-new aquaponics system, and as a result, there is a limited amount of bacteria; and a limited amount of nitrification can occur because they can only process a small amount of ammonia. But, as you put baby plants into your system during startup, you are adding a tremendous amount of surface area (the bacteria colonize their roots too!), and as your plants grow and increase their root area, the bacteria colonize them and increase exponentially until there are zillions of them, and they can handle an incredible amount of ammonia. Hoping to get some positive feedback. Regards
  3. Impacts of high nitrate Nitrate is a far less toxic than the other forms of nitrogen. It is the most accessible form of nitrogen for plants, and the production of nitrate is the goal of the biofilter. Fish can tolerate levels of up to 300 mg/litre, with some fish tolerating levels as high as 400 mg/litre. High levels (> 250 mg/litre) will have a negative impact on plants, leading to excessive vegetative growth and hazardous accumulation of nitrates in leaves, which is dangerous for human health. It is recommended to keep the nitrate levels at 5–150 mg/litre and to exchange water when levels become higher.
  4. We are planning to start the system first with 3000 liter tank with 60 .5kg Barramundis........ and add other fish tanks later........
  5. There is an existing Aquaponic Plant in India which need to be revived. Enclosing the pictures and video of the unit. We have theoretical knowledge and would really appreciate if aquaponic growers can support us to run the system correctly. Was really impressed with iAV Systems for sand grow beds and will be changing one of the DWC systems into that. We have to understand the economic feasibility for the farmers in India. Also planning to introduce gravel media beds. Fish Tanks : 10,000 Liters, Grow Bed Area = 500 sqft, DWC=150 sqft, NFT=245 sqft, Vertical Towers = 100 sqft. Fishes : Tilapia and Barramundi 1WhatsApp Video 2017-03-29 at 7.44.57 PM.mp4
  6. Just got introduced to iAV system for Aquaponics. Could someone tell us whether one needs a bio filter with sand or its works like one and we can avoid having a bio filter completely. How does one calculate the size for a bio filter for say 3000 ltr tank with 60 fishes each around .5kg.
  7. Hello APHQ Members!!!!! I’m from Mumbai, India and had been waiting to start my first urban AP farm. There are not many AP enthusiasts in India. I have not heard of any farms here and especially in the cities. Over the last three years, have been researching on AP and finally found one the most comprehensive forums –APHQ and this gives me the confidence to start a small outdoor AP system.
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