Hey! ok so i currently have an eclipse 12 gallon (largest i was allowed to get for my room). I'm Rather new salt water but not to freshwater. Im wondering what i need to get in order to maintain a possible mini-reef? a couple of fish (percula, damsel, and/or the royal gramma-the pink/yellow fish), an invertibrate or two and some coral/live rock/ maybe anemone. First off, what equipment do i need? Do i need a protein skimmer, because all the ones i see are for larger aquariums. Also, the only pet store i know of is petco, should i find another one to buy fish/invertibrates? because i heard a story about how they stun the fish for an easier capture. Also does crushed coral make the water softer or harder? I know im askin alot, but i really dont want to kill any fish here. [i had a percula in a 5 gallon with one 5 lbs live rock and live sand, it lived for 2 months and then all of a sudden died?] ANY ADVICE APRECIATED!