Hello All. I haven't been on here in a long time, but thought I'd ask this question before I go buying a new pond pump. I have a three year old Laguna Max Flo 4200. Yesterday the flow suddenly dropped. I pulled it out, checked it, cleaned it all out including pulling out the impeller shaft, put it back together, same slow rate. Tonight I inspected it again and thought it dealt much hotter than usual. Seems it shouldn't be too hot running under water and all. What do you think. Order a new one? Thanks!