I recently hooked up my 350 to my 240 for just some added filtration, only problem is that the 350 isnt putting out a decent flow what so ever, its is just trickling out of the return. Could there be something wrong with the impeller? It is probably 6 years old and i have never changed anything on it so i really do not know what could be reducing the flow this greatly, it cant be doing more than 100gph