It is generally not recommended to use cedar incense in a room with a fishtank. While cedar incense is considered safe for humans and pets, some fish may be sensitive to the smoke and fumes produced by the incense. The chemicals released from burning cedar incense can potentially irritate the delicate respiratory systems of fish, causing stress and discomfort. Furthermore, the smoke can leave a residue on the surface of the water, affecting its quality and potentially harming the fish.
It is important to prioritise the well-being of your fish when using incense. If you wish to use cedar or any other type of incense, it is advisable to do so in a well-ventilated area away from the fishtank. This way, you can enjoy the fragrance of the incense without putting the health of your fish at risk.