has anyone else had any problems with there bubble blaster 5000 pumps I am on my 3rd one in 2 years I had the bubble blaster 1000 before this and no issues at all.. my problem I have had is the pump get real loud and looks like it has dropped rpm to the point it wont skim you can see right threw the reaction chamber.. and it wont go back up in rpm until its unplugged and plugged back in.. very frustrating