Using Distilled Water in your Guppy Fish Tank

Using Distilled Water in your Guppy Fish Tank

It isn’t long before many individuals that have bought a small aquarium and a few guppies  start out as a casual hobby but it soon turns into a more serious one. When this happens then a lot more effort is put into the setting up and maintenance of a guppy tank. It doesn’t matter what breed of fish an individual is getting into the water quality is always going to be a main concern. Most individuals have to rely on their tap water as their main source for their aquarium. This means that the water has to be treated as it contains chemicals that make it safe is drinking water but doesn’t create the ideal conditions for the fish. In some cases even the additions of the water treatments are not enough to make the water conditions perfect. In order to combat this a lot of fish enthusiasts have turned over to using distilled water as the water that is best used in their fish tank. There can be some challenges with this as well. Initially  the water in the tank has to have the right minerals for the fish and the plant life as well. In most cases this is done by adding commercial water revitalizers  that are purchased from the aquarium store. In other cases what some will do is mix the tap water with a distilled water keeping an eye on the pH readings of the water while doing so.

Distilled water is where you take the water and boil it so the steam collected can cool and condense back into the original state. It is a time-consuming process and most of those that are going to go with the distilled water just prefer to buy it. This can become expensive over the long term. What has to be kept in mind is that once the water is distilled it contains no minerals or salts and for this reason most will go to using the distilled water just for topping up rather than setting up the initial tank. Also there is not much oxygen content in the distilled water and for this reason most will aerate the water for a couple of hours or leave it stand in the tank for 24 hours before adding the fish to the tank.Ideally the guppy tank should not be comprised totally of distilled water.

The other thing to keep in mind is that if you are storing your distilled water for any period of time that you want to make sure that you keep it in a container that does not contain metal. What will happen in a metal type container is that over a period of time there will be substances that will leak into the water including some of the heavy metals.

Some individuals have turned to using rainwater with the assumption that this is distilled water but they may be forgetting about the pollution that accumulates in the air which the rainwater absorbs. Then there are some that have invested in reverse osmosis units as a way of purifying their water.  You may want to start determining the status of your water by checking with your local water company to maintain or determine what the purity of your water source is that comes from your tap. In most cases you really will find it necessary to go to this extent of maintaining a good water environment for your guppies. Using the appropriate water balancing chemicals that you’re able to purchase usually is enough to provide a quality living atmosphere for these type of fish.


  1. Glad I read this as I was thinking of using all distilled water in my new guppy tank. Now I won’t.

  2. I am glad that it is not necessary to use distilled water in my guppy tank as it seems like a lot of extra work and expense. At the same time though if I had to I would because I really enjoy my guppies.

  3. It took me a long time to get the water conditions just right for my guppy selection so I am not going to mess around with it now.

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