Dirty water from your fish tank is actually filled with fabulous nutrients that will work great for your houseplants and/or vegetable garden. When cleaning your tank out, use that old water for plants. It works like compost would, and provides valuable nutrients for plant life.
One word of caution: If you use chemicals in your tank water, it’s best not to use that water to water houseplants and/or your vegetable garden. Do not do this if you have a salt water tank either.
Have you done this before?
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I discovered that some plant of mine was likely suffering from the chlorine in the tap water, so I’ve always reserved water (collect rain water or just let tap water sit for a while uncovered) for watering plants since then. Actually the same is true for adding water to fish tanks. But collecting grey water is even better!
I’ve got a ton of dirty fish tank water. What a great idea!
It does work! I also use the water from blanching vegetables.