Just freshwater now. When I managed a pet shop that sold salt I set up a 20 long saltwater tank, figuring I could help customers better if I actually had gone through it.
I did everything fantastically wrong (now this was in the old days, maybe 20 years ago). Some crushed coral, a few pieces of decorative coral, a HOB filter, saltwater, DONE.
Damned if that tank wasn't a huge success. It was overstocked, wrongly stocked, haphazardly maintained...I tore it down 2 years later because I was BORED with it. The fish never died, so I never got to add anything new! I think the key was I was able to go to the wholesaler and choose the tiniest examples of fish....I have no idear. "Do as the smart people say, not as I do!" Good thing we hired a fish guy...
Like the dogs fed Ol' Roy, who never see a vet, get no heartworm prevention, have 18 litters of puppies, run across the highway to visit their dog friends 5 times a day, and live to be 22....