Good morning.

When you check your impeller in your filter and rinse it off you can try adding some Nova Aqua (adds slime coating to fish) or whatever you use to add slime for your fish onto the impeller itself. You might see a difference.
My fish have me on a daily routine

I have my lights on timers. I've had most of my fish for so many years I would like to think that they like a routine as well. They eat at the same time every day, lights on and off the same time every day, their tank is maintained the same day every week. It's rare that I stray from the schedule they have me on

I think it gives me peace of mind more than anything else though. Too, it may be less stressful for them to have a routine but I can't prove this.
I have my lights on 12 hours a day. For my tanks this helps to keep algae under control (I like to have some algae in my tanks) The lights are on at 6 am off at 11am back on at 4pm and off at 11pm. This keeps this lights off during the hottest parts of the day (11am to 4pm) and keeps my temperature under control as well. Too, it gives them a few hours of a "cloudy day" by giving them a break for a few hours.
Ken
