When it’s time to clean your aquarium at home, never throw the old water down the drain. Water from freshwater aquariums is nutrient-dense from rotting fish food, fish excrement and other organic matter. Use this nutrient-rich water to fertilize your houseplants, or give seedlings a good start by saturating their growing medium with the old aquarium water. One note: Don’t water plants using old saltwater aquarium water! The salt will dry out and kill plants.
ANDREWS MCMEEL SYNDICATION