I plan to keep a freshwater and a marine tank in my apt.
The former will be heavily planted Discus/Cardinal/Ram
tank while the marine setup will likely consist of live rock, low light
corals plus community fish (Cardinals & Damsels).

Where I live, a tropical region, a room-temperature
tank is around 28-30 C (82 - 86 F). A tank set up
in an air-conditioned room will be around 25 - 26 C
(approx. 77 F).

If I have to choose -one- tank to be positioned in the
air-con room, which one will it be?