Low o2 at night
Anyone else have this issue. Ive got a heavily planted 180g with all the gadgetry (CO2, UV, etc) and Im having issues with fish breathing at the top of the tank in the morning. Im assuming this is due to respiration from the plants pulling the O2 out of the water. Ive rigged a HOB filter on the front of the tank that runs at night..,..this has stopped the fish from being at the top of the tank each morning. The water parameters are fine.
Anyone else have this issue? Im thinking of putting an airpump on a timer opposite of my CO2 to combat this. Any thoughts would be appreciated.