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Thread: General/Hydroponic fertilizer for aquariums?

  1. #1

    Question General/Hydroponic fertilizer for aquariums?

    Hi all,

    I think $30 per bottle of all-in-one fertilizer sold at most LFS are too pricey.

    I'm thinking of mixing hydroponic fertilizer with some generic or seaweed fertilizer.

    Does anyone know if there is any downside using fertilizers from Bunnings?

    As far as plant goes the nutrients should be in the same boat, I'm just not too sure about any adverse effect on the fishes.

    These are the products I bought:




  2. #2
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    Don't use the second. I will have a look at the first when I get a chance.

    I have some ferts for sale for $20 for 500ml if you are interested.
    http://www.aquariumlife.com.au/showt...=green+element

    and this.
    http://www.aquariumlife.com.au/showt...=green+element
    Last edited by Rebel; 07-02-19 at 08:48 AM.

  3. #3

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    If you use terrestrial plant fertilisers in an aquarium containing aquatic life forms, you will kill the fish, shrimp and anything else (except plants). Then you will probably get a heap of algae growing everywhere.

    Terrestrial plant fertilisers contain high levels of nitrogen (N), phosphorus (P) and potassium (K), and this will kill fish and shrimp within a few minutes. If you get iron chelate and a packet of trace elements, it will be safer than adding a normal fertiliser containing NPK. However, you need to add a small amount of trace elements or iron chelate and monitor the levels in the tank water.

    Don't use Seasol or any other organic fertiliser either because they cause massive ammonia spikes.

  4. #4
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    Quote Originally Posted by Rebel View Post
    Don't use the second. I will have a look at the first when I get a chance.

    I have some ferts for sale for $20 for 500ml if you are interested.
    http://www.aquariumlife.com.au/showt...=green+element

    and this.
    http://www.aquariumlife.com.au/showt...=green+element
    Interested in the 2nd one Rebel! do I just PM you?

  5. #5

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    Another option is to mix your own!

    Dave at aquagreen sells all the ingredients. use rotalabutterfly to calculate your mix

  6. #6
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    Quote Originally Posted by Rebel View Post
    Don't use the second. I will have a look at the first when I get a chance.
    This is the type of thread that keeps forums active. Maybe not posting all of the time but certainly getting a great deal of help/advice/ideas from those who obviously know what they are talking about.

  7. #7
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    2nd Lord Of Destruction's comment

  8. #8
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    I find this thread interesting, I have been in the aquarium game for 48 years and I keep Discus and dwarf Americans, I have been using a common Plant fertilizer for years with no ill effects on the fish, that fertilizer being Aquasol at the rate of level teaspoon per 50 gallons.

  9. #9

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    Quote Originally Posted by narserj View Post
    I find this thread interesting, I have been in the aquarium game for 48 years and I keep Discus and dwarf Americans, I have been using a common Plant fertilizer for years with no ill effects on the fish, that fertilizer being Aquasol at the rate of level teaspoon per 50 gallons.
    Wow glad to hear some anecdote based on long-term experience! How often did you dose Aquasol at 1 teaspoon per 50 gallons?

  10. #10

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    100% dry ferts for me. Wayyyyyyy cheaper than the pre-mix stuff and gives you flexibility to tweak the ratios.

  11. #11

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    May we have some pictures of your tank narserj? Would love to see some!

  12. #12
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    Quote Originally Posted by Orcustus View Post
    H
    I'm thinking of mixing hydroponic fertilizer
    I've had a look and I don't think it's a good idea.

    It's got ammonium phosphate which is a super garden fert though. Ammonium phosphate is not really widely available in the shops for various good reasons.

    It looks to be a compelling choice for hydroponics also!


    If you do try them, please report your findings here. We all like to be surprised and I like to learn new tricks.

  13. #13
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    Quote Originally Posted by TheCasualist View Post
    Interested in the 2nd one Rebel! do I just PM you?
    I've sent you a PM. The second plus version is $30 as it also contains glut! It simplifies the dosing to a single container. Like the original Green Element, I offered the PLUS version first in Australia.

    You can always tell your grandkids that you saw it first in AL.

  14. #14

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    Quote Originally Posted by Rebel View Post
    I've had a look and I don't think it's a good idea.

    It's got ammonium phosphate which is a super garden fert though. Ammonium phosphate is not really widely available in the shops for various good reasons.

    It looks to be a compelling choice for hydroponics also!


    If you do try them, please report your findings here. We all like to be surprised and I like to learn new tricks.
    Thanks for looking into it Rebel. I'll let yous know if my fishes tolerate it.

  15. #15
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    Also algae. Ammonia can cause algal blooming.

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