Hi, I just started a saltwater tank a few days ago. I'm 21 years old and a full time college student, and I can't afford a ton...so I started a 20 gallon. I know I should go bigger, but I have a tiny apartment, tiny budget, and tiny amounts of time...so that's that. My dad always had an amazing saltwater tank while I was growing up and my friend is a saltwater buff and has a cool 75 gallon tank, so he encouraged me to set one up (really he set it up). SO. As of right now I bought a 20 gallon tank from his friend that is just a standard tank with a standard light, filter, and heater. I bought a second filter that's a lot better and made the water much more clear (a power filter penguin 100) All else I've bought so far is live sand, 1 piece of 2lb live rock, two damsels, and two little crabs. My friend lives in the apartment below me so he brought up water from his tank and put it in mine so it has already got plenty of bacteria in it...I'd assume? Then my dad gave me some instant ocean, a hydrometer, and a few pieces of coral he had left over from his saltwater days. My intent for the tank would ideally be a reef tank someday...but that is going to be a very long process just buying small things as I get the money. So without proper lighting right now or a protein skimmer or much else... i just want some fish. I'm a beginner, so cut me slack...and don't hate me for saying what i'm about to say...but I'm really not going to do copious amounts of research to learn how to do this the right way...I'm too busy doing research for school. I'm using this small tank as a sort of learn as I go set and I just assumed to get small bits of information here from you all then do a little reading on what you say and go from there. My biggest dream is a cow fish...sadly I realize my tank is too small. But I do want a fish with personality. My damsels look pretty ... but they just remind me of stupid brainless goldfish. I LOVE animals, so think before you judge, but would it be cruel to buy a baby cowfish and keep him until he gets too big for my tank and then introduce him to my friends tank? I don't want to cause him too much stress because I know there's the possibility he'd poison all else in the tank. But i guess my main questions would be, what do i need right now? Tester kits? do i absolutely need a protein skimmer at this point in time? do i need chemicals? do i need a hose thing to clean it? I just need to know the basic tools to get before I go any further. I'm not trying to make this amazing on my budget, I'd rather put a ton of money into an expert bigger tank once I get the hang of everything. So please don't be too discouraging... Thanks!!