We add small amounts of different chemicals to Sydney's drinking water to help make it safe to drink, including chlorine and ammonia. While they’re present at low and safe concentrations, they may affect fish or other creatures in your fish tank, aquarium or pond. Download our fact sheet for more information about how to protect your fish.
Our daily drinking water quality report confirms how chlorine levels at your tap compare to the Australian Drinking Water Guidelines limit of 5 milligrams per litre. You can reduce the level of chlorine (and other chemicals) in different ways. To dechlorinate your water, it’s usually enough to leave it in an open container for 48 hours. Once you’ve done this, the water should be suitable to add to your aquarium. You can also use an aquarium water conditioner to remove chlorine and chloramine, and nitrifying bacteria can reduce nitrate and nitrite.
You may have fish that need water that’s high in pH and minerals, or fish that need water that’s low in pH and minerals. Shrimp, frogs, turtles and axolotls have their own specific requirements. If you’re in any doubt, please check with your aquarium supplier.