Personally I don't turn the return pump off I don't thing many will. If anything Ppl just turn off their power heads. I personally don't turn off anything even thou I have it set up on my apex to turn off my power heads with the "feed function" this allows the food not to blow around as much and not get trapped I. Rocks so that the fish get more food faster.
It all comes down to what you prefer. I am sure you will get a mix of do's and do not's so try it both ways and .... Go with the flow so to speak
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