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  • 1 Post By ksriramkumar

Has anyone use freshwater aquarium water on orchids?

This is a discussion on Has anyone use freshwater aquarium water on orchids? within the General Orchid Culture forums, part of the Orchid Culture category; Has anyone used freshwater aquarium water on their orchids? I have a friend who does ...

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  1. #1
    llstl56 is offline Junior Member
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    Default Has anyone use freshwater aquarium water on orchids?

    Has anyone used freshwater aquarium water on their orchids? I have a friend who does and his orchids are growing and blooming like crazy. The fish urine and feces in the water is like fertilizer for orchids.

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    ksriramkumar is offline Senior Member
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    Hi,

    I do grow water lilies (thats my other hobby) and I have some freshwater fish in the water bodies. once a while, I use that water for my orchids and they love it..my guess,this water would contain more usable nitrogen + other minerals in the fish poop and in my opinion, certainly better than any chemical fertiliser.

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    I have always used my aquarium water and all my orchids (many different genus) seem to be fine. I use a dechlorinator in the water before I add it to the aquarium and do fairly regular water changes so the nitrate levels are very low - but I'm sure there are trace elements of usable 'orchid feed' in there.
    My only advice would be that you would need to check the PH of the water to be used. My hard London tap water - which I wouldn't water my orchids with - starts at 7.7 (quite alkaline) and only goes down to just under 7.0 after being in the aquarium.

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    Chris1140 is online now Senior Member
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    I tried using aquarium water on a couple of Paphs as an experiment and they both developed a brown fungal
    leaf spot disease. I wasn't sure why since I have used aquarium water outside on garden plants and they love it. Maybe it had to do with the fact that the fish poop in the aquarium water was not fully decomposed?

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    pipsxlch is offline Senior Member
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    I have, very successfully. For quite awhile, this was all the fertilizing they got, and they grew and bloomed. I still do use it as a base for my fertilizer.
    Chris1140- if the method of watering was no different (i.e. some water got on the leaves and remained there that wouldn't have with your normal method), it could have been some microorganism in the water I suppose. A normal 'mature', fully cycled aquarium is loaded with them. If you normally use city tap, the chloramines kill most everything in it.

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    Quote Originally Posted by pipsxlch View Post
    Chris1140- if the method of watering was no different (i.e. some water got on the leaves and remained there that wouldn't have with your normal method), it could have been some microorganism in the water I suppose. A normal 'mature', fully cycled aquarium is loaded with them. If you normally use city tap, the chloramines kill most everything in it.
    You're probably right, I do water the orchids with tap water, and yes my tank is fully cycled. I suppose the orchids (which grow indoors only) are not used to being exposed to all the microbes in tank water.

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