In 1988, I wrote a grant for a 75 gallon fish tank for my 1st grade class in a Philadelphia public school. Needless to say, the tank immediately became an object of great interest to the entire school, as it originally began as a salt water tank (note to self, salt water NEVER again!) . After a couple of years, common sense prevailed and the tank reverted to a fresh water - and much more manageable - classroom endeavor. Among the first fish in the tank were 4 small "silver dollars" and 2 small "sharks".
The tank was a great success and, thanks to the maintenance guys and delayed feeders, the fish oversummered in the school quite nicely.
In 1995, I learned about someone who was offering a 200 gallon fish tank for free. Based on the success over the years of my 75 gallon tank, we set this monster up in the school library, where it still is fascinating students and visitors alike. When I left that school in 1998 to become the Service Learning Specialist for the School District of Philadelphia, the silver dollars and the sharks went right into the 200 gallon tank. On a recent visit back to the school, there was the fish tank bubbling away in the library and, lo and behold! the silvers and the sharks are still delighting students 17 years later.
It was very nice to see that a legacy began almost 20 years ago, a whole generation! - is still helping to create a very nice environment in the school library.