
That would be a great help if you could haven't got the cash for a new res and pump at the mo. Unless I can find something used. How many posts before I can view the for sale on here?
How long have you had the 750? I've noticed that they quieten down after a while, but It can take a few weeks. I'm not sure if it's tiny bubbles or that the pump just needs to be run in, but I've used 3 or 4 and they have all been the same