Something fishy for your gardening!
Your fish tank can also do some green gardening for you! Just don’t throw away the dirty water left over from cleaning it! Treat your house plants to this fishy soup which is rich in nitrogen and phosphorus! It becomes a good free plant fertilizer for them, say Sarah Callard, Esme Floyd and Diane Millis in their book The Eco Lifestyle Handbook!
Egg-water for houseplants: If you like boiled eggs, remember to save the water that you boiled them in! Your house plants will benefit from the nutrients released from the shell of the eggs during cooking! When the water cools, pour it over your fittonias, ivies, ferns, geraniums etc.!