Adding oxygen to the tank

[fishgate]

On the tank I am about to nuke, I decided to turn off the heater. So the tank went from 81 to around 75. No surprise but everything in the tank is springing to life. Algae is growing, mushrooms are spreading, and of course the Aiptasia could not be happier. Also have bubbles in the tank everywhere now.

Anyone know percent wise how much more oxygen water can hold from 81 to 75?

 

[thegrun]

You would probably get a quick answer over in the Chemistry Forum. I set my heaters at 75 degrees during the winter, for almost all tropical marine fish and corals there is no need to keep the tank up at 78 degrees.

 

[KafudaFish]

About 1 mg/l.