Goldfish Tank Water Change

Aquarium Water Change

No question, a goldfish tank water change is a must to ensure the health of all living things in your aquarium. There is however much debate among goldfish owners about how much water should be changed during these routine water change and what makes for the best goldfish care. In general, there are three basic practices of tank water changing: replacing evaporated water, a percentage water change and an entire tank water change.

The first one is never recommended. When water evaporates and lowers the water level in your goldfish aquarium or goldfish pond, it leaves behind heavier pollutants. Over time these pollutants can make your water denser and build to unhealthy levels if all you do is replace the evaporated water. You might even notice the water line marks on the sides of your goldfish aquarium glass; those are the remnants of what is left behind when your goldfish tank water evaporates.

The next two practices are bit more fuzzy and there are essentially two schools of thought. The first being that you should not change all the water in your tank at once because it will change the chemistry of the water too much and will stress or kill your goldfish. The other being that you are not eliminating all the waste in the goldfish tank with a partial water change and that over time the waste levels can build to unhealthy levels.

Both schools of thought are correct; both can cause problems for your goldfish and both stress the importance of having fresh clean water in your goldfish aquarium – so what do you do? Typically, most advice found on the internet says to change at least 20-30% and to never change all of your goldfish tank water during routine maintenance. If you do 20-30% water changes your waste levels will build up but it won’t likely kill your goldfish. They would of course be happier with a larger water change so if you are feeling guilty, up your tank water change to 50-75%. This will eliminate much more waste and by leaving some water in goldfish aquarium, will not drastically change the chemistry of the water.

To eliminate the rest of the waste and pollutants try following some basic routine maintenance and learn how to clean a goldfish aquarium

photo credits: / CC BY-ND 2.0

Share on Tumblr