Saltwater fish tanks

Many years ago, I was a partner in a company that made and serviced custom designed, refrigerated, salt water tanks. Home tanks were 50 gallon, but we made commercial tanks up to 500 gallons, including one for an octopus that required complicated filters for the discs they shed from their tentacles.

Since we were the first company to do that, it was a frustrating and humorous experience while we learned that marine animals were real escape artists. Crabs were the worst, and we often had to search behind furniture in a doctor's office for missing crabs.

After a couple years in that business, I was very relieved to get back to fresh water tanks...as a hobby, not a business. Salt water tanks are beautiful, but far too much work unless you really love doing it.