1-C. The most important thing is to clean the tank and change the water at least once every two weeks.The most important thing is to clean the tank and change the water at least once every two weeks.
2-C. However, be careful not to put sharp objects in the tank that could harm your fish.However, be careful not to put sharp objects in the tank that could harm your fish.
3-C. First, choose the largest possible tank you can afford and decorate it with objects such as small rocks and plants.First, choose the largest possible tank you can afford and decorate it with objects such as small rocks and plants.