We have a small basalt column water feature and have been using a PondMaster 2.5 250G pump to run it for over. The first one of these pumps we had ran for 7 years before it finally kicked the bucket. The other thing I like about these pumps is they feel heavy duty and have a 5 yr warranty which is longer than I've seen on any other pump. It was an easy choice once it came time to replace our other one.