I have set up a new 120 gallon tank in my office (all the livestock and rock came from existing tank) and I was wondering about water flow. I am only doing softies and I have 2 x Koralia 4's and my return pump is a Mag 12 and it seems like alot of sand is getting pushed around. Can there be too much flow, and should I maybe only use 1 of the Koralia's? Any input would be appreciated. I have attached pictures - the green algae should go away soon since I just set up my refugium and just got a few mexican turbos to start eating it. Thanks
