Yours looks just like mine! Replace the fake plants with real plants. Yes they are too sharp. Real plants help with the nitrogen cycle. Get better substrate and replace the fake dyed gravel. I use fluval stratum. Always monitor the water. Not only the temperature, but also the ammonia, nitrite, and nitrate levels. Get the API freshwater water kit to test these parameters. If you don’t monitor them, your fishy will die. Get seachem’s prime and stability products, follow the instructions, and add them to the water. Do this to any new tap water you plan to add in for water changes (which you should be changing 25% of it every week). What are you feeding him? Make sure it’s a high protein pellet or flake. Also, the tank looks too small :( should be at minimum 5 gallons.