Hi just wondering does anyone else experience problems with their BluWave filter? I have the 07 version and it's constantly letting me down. If it's not rattling and making the most awful loud noise, then it's spitting bubbles out, it floats outwards off the tank, it sinks back down, it basically has a mind of it's own - pain the butt! Just ordered another one but wondered whether it's the BluWave filter that's pretty bad or just mine is knackered?? Many thanks!