Old Perfecto Hood,
Hagen Aqua-Glo 15watt,
Read forums, read articles, read read read. Then when you've gotten sick of reading, talk to whoever you can that has ever kept fish.
Danios (all kinds),
Brazilian Swords (mine do fine submerged),
Mondo Grass (mine does fine submerged),
The first shall be last and the last shall be first
Just got into the hobby.
The pet trade gets a bad rap for exploiting wild animals but sometimes the opposite is true.
Modern advances in technology affect every industry - even the aquarium hobby.
If you are looking for a unique invertebrate to add to your saltwater tank, consider the sea urchin.