Hello all, I have a 125 gallon with a 20 gallon sump. Still in cycle phase but new to creating a refugium in it. Currently, main chamber is the skimmer and bit of live rock, 2nd chamber is refugium with miracle mud and live rock, bubble trap next with chemi-pure bags, final chamber is return pump, heater, and ato sensor. I was wondering what the flow rate should be for the sump, main tank has a Jebao OW-50 wavemaker, and a canister filter fluval 406 running along with the sump. I use a overflow box for the sump with a pump rated for 630 gph, but only have it at 90% flow or so but wonder if its too fast and also if I am using this sump do I even need to use my old canister filter on top of it:?