hi, i just transferred my freshwater fish that were in my 10gal to a 29 gal bow front to give them enough space to be healthy. i want to turn my 10gal into a saltwater for 1 or 2 fish. i have a heater, hood, light, gravel, and a whisper filter on that 10gal tank already. what do i need to do or buy to transfer it into a saltwater tank? and what fish would you recommend. thank you