I am running a Jebao DCT 4000 on a 90 gallon. I also run an Aquaclear 70 and a Cascade 1500. Those two are around 600 gph together. The Jebao is running on about 6 feet of tubing and two 90 degree elbows. I run it on the third setting only. Do I have enough flow with this equipment? I can crank the Jebao up. I don't think its a lot gph on high even because of the hose length and 90 degree turns. Maybe only 300 gph on high. But water gets chaotic in the refugium on high. I have chaeto and it looks very turbulent. I don't how many gph with it on setting 3. Just relucant to put more gph in it. Don't want to mess with the fish.