= Fresh water. SW
= Salt water
is to a list of commonly used abbreviations and acronyms. You can find it under the FAQ menu in the blue navigation bar at the top of the page. I still have to refer back to it sometimes too.
You'll have to browse through the "getting started" forums to decide which way you will want to go. One thing i can tell you is that FW
is cheaper to build and care for. so if cost is a factor FW
would be better. There is not much else that you can purchase before you decide which way you go except a heater.
I have a 40 gal
planted tank which you can see in my profile. Just click on my name.
One more thing. Welcome to Aquarium Advice