What is the level of filter vs the height of lift for the filter it should handle a standard lift of 3.5 feet but in case it is farther away, that could be an issue. How frustrating for you. I have 2 FX-5 and love them Also the 110 is a pretty good option - biggest turnover G p/h hob
as far as I know.
An issue I had one time was not leaving enough room for the water to circulate / because I filled that sucker up as much as possible with media and also added filter pad about the top line. Barely ran.
They (customer service) have been really helpful for me when I have had any issues.
Did you get any possible answers yet?