Tropical Fish Keeping - Aquarium fish care and resources

I came across this forum when I was researching how to start a saltwater aquarium. I was hooked when I saw the community photos of the set ups everyone has, and the overall information this place has to offer. Im not new to aquariums, I had a 30 gallon tank set up for the last 2 years for my daughter(she loves fish). That all changed when my wife brought home a few algae eaters from walmart. They destroyed everything. Is its safe to say that walmart doesnt maintain healthy fish ? Anyway, the tanks been down a few months and I am now looking to get it up and running again only this time I want it to be saltwater. So, thats it, I look forward to learning about saltwater aquariums....