Best info article is linked in my signature for newbies or just making sure you know what you're doing. Excellent basics. Welcome!
What kinds of fish or aqua critters do you have / or are interested in so far?
New to FW fish? First tank in a long time or EVER??? Need some info on keeping fish?
Start here - Aquarium Advice Article
FW Favorites right now Clown Loaches, any shrimp - SW Vase Red Mangroves