I use the water from my tank's water change to water all my plants in the house. I can fill almost three watering cans which is enough for two waterings of the

I use the water from my tank's water change to water all my plants in the house. I can fill almost three watering cans which is enough for two waterings of the various decorative plants and herbs I have (I don't have any vegatables or this surely wouldn't be enough). And that's just a measly 10 gallon aquarium.