not sure about the plants, but do check the directory and call them up ahead of time to ask
-id recommend you buy a heater, AC will be on in the summers, and esp with the tetras or any small fish in general, temp does matter. i dont think they'd make it through 24C for long
-not sure about the non-canned fish food as well.
note: if your going to use flakes, try a couple brands out 1st, some end up coloring the water in your tank
good luck!