Ok. Well I just bought a fresh water 20 gallon tank off craigslist. Its very very nice but want to convert it over to a salt water tank. I've been out of the game for a LONG time now. I use to own a 55 gallon salt water tank but that was Y E A R S ago, and to be honest I don't remember much about starting a tank up. So the tank I got is 20 L, has a cheap filter from walmart, a hood w/ light ect... I know I pretty much need to start from the beginning and start from scratch. But I've always wanted to do a 20 L so now I have the foundation to do so. I want to do a tank with a few (maybe 2) Clown Fish. Maybe a few other things? I know with a 20 L I can't put a ton in,... but what else could I put in? A yellow tang? A blue lobster / shrimp? Ect? I want a few different things in there but not a lot. I don't want the tank to look really cramp. I like a nice clean look. I want to go with live sand and a few lil things here and there. I like it when the tanks have the " blue " look to it... Do i need special lighting? And what do I do about getting the tank ready? What kinda filter do I need? One that hangs off the back, or underwater? Ect. I know this tank has a heater with it but do I need a special one? Pretty much I'd say I'm a newbie all over again so please please help me out. I don't want to go crazy with this thing, no sump ect. Just a nice simple 20g l, with a few lil things. Help me out!!!! Thanks