AJ and I got the bubble fountain pump replaced last weekend.  AJ did the "install" and I did the rest - digging out the rocks and covering it back up - he got the easy part!  It's been down for a couple of weeks, so I'm glad to get it back working.  Luckily it was a bit cooler by the time we got to the install, our weather has been in the mid-90's this week.  Much nicer than our 100+ the weeks before!