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Uses for Fish Tank Water

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Two goldfish in a tank with green plants.
Aquarium water contains a lot of nutrients that if used to water plants can provide natural fertilizer. This is a guide about uses for fish tank water.


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September 27, 20160 found this helpful

This is a guide about using aquarium water for plants. If you have an aquarium consider using the waste water when you clean the tank to fertilizer your garden or houseplants.

Aquarium in the middle of a water change

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December 2, 20040 found this helpful

What do you do with the leftover water from your fish tank maintenance?

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By guest (Guest Post)
December 2, 20040 found this helpful
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I use it to water my plants. It makes a nice no-burn fertilizer for my herbs. I used to use fish emulsion, but since I became a vegetarian, this has been a humane solution that costs nothing!

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