I have an elaborate water feature with a stone line raceway the flows 65' with several waterfalls in its 12' drop. 3000 gallons of water per hour flow between the two ponds and for five or six years of constant maintenance it was absolutely gorgeous. However, it is a lot like deciding that since all of your kids are grown lets get some more. Lots of work. Currently it isn't working and I'm seriously debating the wisdom of getting it operational again.