Welcome on board!
The best aquisitions you can make in starting out is a few good resources of information.
I'll start a list for you, I'm sure others will add and annotate:
The Coral Reef Aquarium - Ron Shimek
The Natural Reef Aquarium - John Tullock
Aquarium Corals - Eric Borneman
Sandbed Secrets - Ron Shimek
other authors to look into are Palleta, Sprung and Delbeek. You might also do a thread and/or library search as Tangirl suggests, and include "books" in your search parameters. It's simply impossible to over-emphasize the importance of being well-read before taking the plunge.
If your decision to go with 20 gal. is a function of the fact that you're just starting out, keep in mind that the greater the water capacity, the more forgiving your system will be. Food for thought. Read lots first.
Best of luck! You've come to a good place for input. Don't be bothered/confused if opinions vary on various topics. Obviously there's more than one way to skin cats and keep reefs. The best remedy for any confusion is to read and ask even more. Save lots of frustration and $$$!
regards,
-rw
[ April 20, 2002: Message edited by: reefworm ]
[ April 20, 2002: Message edited by: reefworm ]</p>