To do a water change without disturbing the substrate, you can follow these steps:
1. Using a gentle flow rate, siphon out the water from the aquarium.
2. Be careful not to disturb or suck up the substrate while siphoning.
3. When adding new water back into the tank, use a diffuser or pour it slowly over a plate or a bowl to minimize disturbance.
4. Avoid pouring the water directly onto the substrate as it can cause cloudiness and disruption.
5. Regularly check the water parameters and maintain a healthy environment for your aquatic pets.
By following these steps, you can ensure that the water change process is done smoothly without causing disturbance to the substrate in your aquarium.