As previously stated, you have the opportunity to make sure you have NO issues by doing a water change. Do the water change.
I don’t think you have much of a concern if it was an aquatic fan but I wouldnt take the chance if I could fix it now.
as long as you have flow in the tank you could go quite A while with general filtration systems off. (Battery backups are for power heads to keep the flow going upto 36 hours.. 5-6 hours isn’t going to hurt anything.
if it’s much longer than that I would move my heater to the display.
I don’t think you have much of a concern if it was an aquatic fan but I wouldnt take the chance if I could fix it now.
as long as you have flow in the tank you could go quite A while with general filtration systems off. (Battery backups are for power heads to keep the flow going upto 36 hours.. 5-6 hours isn’t going to hurt anything.
if it’s much longer than that I would move my heater to the display.