powerhead controller

Hi everyone, I recently set up an Apex controller for my aquarium, and I'm thrilled with its capabilities in managing and monitoring my tank. It's made me keen on having more control over my equipment. However, I've noticed that each piece of reefing equipment comes with its own controller box...

I know coral enjoy the flow during the day time, but what about night? Do we lower flow for them? Do we lower flow for the fish to sleep? I know reefers didn’t worry about this when controllers weren’t a thing, but I’m curious where it stands and what everyone does.

Used Hydor Smart Wave Powerhead Controller Works perfectly Located in LA I would be willing to trade for a Nano Doser, ATO, helpful/important reef additives, and other general equipment. Also could sell for $40 if anyone is interested in doing that.