Hey, not official yet, but i would really like to get a 40 gallon and start a saltwater tank, and i have a few questions. First off, is this a good size tank? Also, what type of filtration should i use (hob, canister, or sump)? Then, what other supplies/equipment is necessary for me to have? And how much is rock/sand? and do i need it live? I'm trying to price out what it would be and figure out if I'm able to go through with it or not! Thanks!