My fish tank of many years needs replacing, and the one thing I really want to change is to find a pump and filter solution that is extremely quiet, yet durable, reliable, and servicable (for the filter media cleaning or replacement). Tank size is going to be close to 55 gallon. Freshwater goldfish only. What to buy? What to avoid? I've had the sort of hang-on-the-edge electromagnetic piston pump with flow through a filter bag sort of pump an dfilter in the past and they've all seemed really loud to me, so I want to avoid those for sure.