This is a discussion on ashchaser within the Introduce Yourself forums, part of the Welcome to Tropical Fish Keeping category; -->
I am new to salt water and I am going to buy a 75 gal ,so what should I do next...
a 75 gallon is a decent size and has a nice width which will make placing rocks easier.
if it isnt a reef ready tank ( has an overflow in the back ) you may want to consider making it one before filling it up. i can suggest glass holes overflows but this only really matters if your adding a sump.
alot of reading before buying is the best advice i can give you. look at how other people set up their tanks. then ask questions (just be aware of who it is giving the answers, esp. a fish store that views you as a customer )