Mandarin , the tank has been up for 5 months...we are using rodi water. we do water changed frequently and all of our levels are in perfect range. i have a power head rio 1600 i think. protein skimmer. But this tank is not the 75 gal. it is the smaller one we have that is 45 gal. The 75 we are just getting ready to set up. We have that with the flow. The water comes across and hits the front and goes to the right side. yes i am a daycare provider. And we love to watch the kids. We ordered some moon lights last night so will put them on when we get those. The kids dont feed the fish. I am the only one that feeds them. Or hubby will but asks first to be sure we are not doubleing up. filter system is a 280 empioror. Thanks!