Turning down the flow at night?

[bsmith065]

I've just completed a re-design of my 90 gallon tank... complete with an over the top closed loop system and some WavySea wavemakers.......

Lots of flow.... some nice current going there.

I currently have the system turning on with the lights... so I let it "rest" overnight... and let the critters feed, based on some input I had from a few people.

I was reading recently however that oxygen levels get low at night, and that is it best to keep everything going all night long.

Any thoughts out there?