air

Does my 120 gallon fish tank with a 6 month old Arowana have too much oxygen or is it good enough? ( there is also a bit of nano oxygen in the back.)

Silver arowana around 14cms, is stationary in front of aerator pump and gasping for air. Mine is a 75 gallon tank, recently(almost a month back) the nitrogen cycle crashed and there was ammonia spike , so I have been doing continous 30 percent water changes in alternate days and am maintaining...

My Florida gar jumped out over night. I threw him back in the tank this morning and he started to rehab movement. I then grabbed him and held him over the air stone thinking this would get everything to flow through his gills. He's swimming around fine but it looks like his butt wants to keep...