I just bought my house a year ago in June. The pump (Pentair Superflo 2 hp) was replaced in May of 2011, right before I bought the house. It has already failed, it just kept getting louder and louder of the last few months. I cannot understand what happened to the pump. It's on a timer, and I was running it approximately 10 hours a day. I followed the previuos owner's instructions and the pool has been great all this time. At any rate, I am not at all handy and am going to replace it this week. My question is what size do I need? I am at 2hp now. With the solar panels and all, do I need a bigger one, could I get by with a lower HP or should it stay the same? Also, I am considering going with the Whisperflo iinstead of the Superflo. Has anyone done that? Thanks in advance. I am so happy I found this forum.