How to Properly Change the Water in a Fish Aquarium

Changing the water on a regular basis is an important part of fish tank maintenance. Maintaining fresh and clean water is the best way to keep levels of harmful organisms and chemicals low. However, changing the water correctly isn’t as simple as it sounds. Many tank owners who are new to fishkeeping unknowingly damage their fish by changing the water improperly. The staff at Aquatic Warehouse, a leading aquarium supplier, explains how to properly change the water in your fish tank.

Don’t Change All the Water at Once

Many people think changing the water in a fish tank is as simple as dumping out all the old and putting in the new, but this is a surefire way to shock or kill your fish. Replacing all the water at once decimates the tank’s bacteria levels and alters the temperature and pH of the water. Never remove more than half the water from the tank at one time. The safest method is to change 20-30 percent of the water two to three times per month for most aquariums.

Condition the Water

Another common mistake novice fish tank owners make is to add water straight from the tap. It’s important to condition the water by adding Prime or Amquel water conditioner into a bucket with your municipal water, then adding the dechlorinated water to the aquarium, as this allows gasses that may harm the fish to dissipate. You can also buy water quality test strips for fish tanks if you’re unsure about the water quality.

Prep the Tank

Turn off all filters, heaters, and other electric devices in the tank before you begin the water changing process. These items can break or malfunction when exposed to lower water levels. If your tank is looking dirty, now is a good time to remove and clean decorations and wipe down the insides of the tank.

Remove the Old Water and Add New Water

Use a siphon or gravel vacuum to remove the water from the tank. If you use a siphon, watch the tank’s water level to make sure it isn’t removing too much. The benefit to using a gravel vacuum is that a lot of the fish waste is pulled from between the gravel, which raises the water quality.

Keep Your Fish Safe

Most healthy fish, even very small ones, aren’t in danger of being accidentally sucked into a siphon or water changer. However, some fish may chase after debris that is being sucked up and end up in the tube. Watch your fish carefully while the water is being removed to prevent them from being killed or injured by the suction. Run the flexible plastic tubing through your fingers so you can pinch the tubing off to slow down the water being siphoned. There’s an art to this, but with a little practice you can gravel vacuum your aquarium and have it crystal clear even before you add in the new water for your water change.

If you’re new to freshwater and saltwater aquariums, get in touch with the aquarium experts at Aquatic Warehouse today. We carry everything you need to properly care for your tank, and we also carry pond filters and other supplies for outdoor ponds. Stop by our store in Kearny Mesa, check out our website, or give one of our friendly staff a call today at 858-467-9297.