If you use soap, make sure to rinse it off thoroughly. Soap residue can kill fish.
You will also need: a sink, a plastic cup or net to scoop the fish and water, paper towels and a scrubber to clean the inside of the tank, water conditioner (which is available at most pet or aquarium stores), a sieve to use when cleaning tank gravel, and a plastic spoon.
If you are a new owner, you can start by 50% water changes and gradually increase it till you reach 80%. Most of the filth in a betta’s tank is in the gravel at the bottom. If you take the water off the top, then you will still be getting rid of most of the dirt and grime when you clean the gravel.
Place the fish into the glass or bowl that you have already filled with tank water. Keep in mind that while doing this you need to make sure the fish doesn’t jump out. Bettas are known jumpers, so put a lid on whatever container you are keeping the fish in.
Remove any decor that is in the tank as well. You can simply set it on top of the gravel in the sieve.
Never use soap on anything in a fish tank, including the tank itself. [2] X Research source The residue is likely to remain and hurt your betta.
Use a plastic spoon to stir the water, making sure that the conditioner is mixed into the new water thoroughly. Remember to reserve enough room for the original water that you took out of the tank. Pour the old water you reserved back into the tank once the new water has been conditioned. Stir it all together well.
Water coming to room temperature could take a while. Check the water after 24 hours using a thermometer to make sure the water temperature matches the ambient temperature in the room. If it is not room temperature, wait a few more hours and then check it again.
Keep an eye on the betta. Once you let it go, it’ll soon start exploring the tank. Set your tank back to where it was and enjoy as it swims around observing everything!
