Tip No: 2 - Don't throw out water change waste
Water changes or partial water changes in a fish tank or aquarium can use gallons of water weekly, and it is vital for the preservation of the enviroment for your fish, so it has to be done.
But the water you remove can be where you save water! This dirty water is not just dirty water it is now full of nutrients that plants need! (Only use on non edible plants though!)
So you will not only save water, but you will save a fortune on expensive plant foods! (Remember to try a little on a new plant before topping it all up as different plants have different nutritional requirements.)