I have a flora. Same tank. I had to add a second stock light to carpet dhg belem (still took forever and a day) as far as the background goes I tore mine out and silconed it back in without any issues. I did however let it sit w o water for a few weeks before flooding. Can't speak for the fish food but I would recomendation ditching the filter. It takes up a lot of real estate. Eheim 2213 does wonders for mine. Good luck w the tank!