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  1. #1
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    Join Date
    Jun 2016
    Posts
    1

    Plant Nutrients Fundamental Question

    Hi, Im newbie in aquaponic.

    Would like to ask some question.

    My question is :

    In aquaponic, is it enough for plant to consume only Nitrate?

    How do the plant get other source of nutrients that they need ? such as :
    1. Phosphorus
    2. Potassium
    3. Calcium
    4. Magnesium
    5. Sulfur
    6. Boron
    7. Chlorine
    8. Cobalt
    9. Copper
    10. Iron
    11. Manganese
    12. Molybdenum
    13. Nickel
    14. Sodium
    15. Zinc

    Thank for your kind answer

  2. #2
    Members
    Join Date
    Oct 2013
    Location
    Odessa, Florida
    Posts
    4

    RE: Nutrients...

    Quote Originally Posted by kret View Post
    Hi, Im newbie in aquaponic.

    Would like to ask some question.

    My question is :

    In aquaponic, is it enough for plant to consume only Nitrate?

    How do the plant get other source of nutrients that they need ? such as :
    1. Phosphorus
    2. Potassium
    3. Calcium
    4. Magnesium
    5. Sulfur
    6. Boron
    7. Chlorine
    8. Cobalt
    9. Copper
    10. Iron
    11. Manganese
    12. Molybdenum
    13. Nickel
    14. Sodium
    15. Zinc

    Thank for your kind answer
    For the most part the answer lies in the food you feed your fish and a PH at a little above neutral. Aside from that basic, I have found in my own system (http://aquadonics.blogspot.com/) iron and magnesium are the nutrients I need to add. I have found Sequestrene 138 FE to be the best for my system and Epsom salts for magnesium. The Epsom salt doesn't seem to bother the fish at all. I don't measure, it's just instinct for me. But I add a little at a time giving maybe five days apart until the plants look as good as I expect them to look. And I have found that cleaning my grow beds as infrequently as possible helps to stabilize PH. I use Red Wiggler (composting) worms in my grow beds to balance the solids accumulation and decay ratios. It's been four years so far since I had to clean the grow beds and they still look good. A good article about iron replacement in aquaponics can be read here:http://blog.brightagrotech.com/iron-in-aquaponics/ and a good article about PH can found here: http://blog.brightagrotech.com/lower...in-aquaponics/

    Secret tip: I spray the foliage in my grow beds once a week with a 50% solution of Miracle Grow, being careful to minimize spraying the medium.

  3. #3
    Members
    Join Date
    Aug 2016
    Posts
    5
    What about other nutrients?

  4. #4
    Members
    Join Date
    Aug 2016
    Posts
    3
    What type of fish do you have in your system?

    Are your additions and Miracle Grow sprays safe for food grade tilapia?

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