I tried a Fibredyne, Just binned it & now sticking to the cheap 5 micron white filters, changing weekly or sooner if required.
Your filter is starting to clog! which will eventually result in zero feed to the r/o as I found out recently. When investigating, we removed to feed to the membrane and almost completely black water was visible! I don't believe me produced more than 15k from it.
When purchasing the new membrane, i was chatting about the filter to the company i bought from, they did believe the stated figures and warned to be cautious, guess they knew something.
I'm now running at great production rates of 1000lt - 6/8 hrs.