Hey everyone I built my first scrubber this week and need some opinions. I have a Rio Mini 150 pump 3-3 1/2inches from the top of my 46 gallon tank feeding down a 3ft line under my tank this is my intake. The Rio is rated 40GPH but seeing a faster flow from the 3ft drop. This puts out quite a good flow underneath for my filter. I then have a Petco Powerhead that is rated 250gph pushing water out of the 10 gallon tank up a 4ft line into my 46gallon. With these two together they match up perfect. I tried a suction feed but the water would come to fast for my 250GPH pump to push it back up. Tried smaller and smaller lines and couldn't get it right. Tried my Rio40GPH and worked perfect. Right now I have one 30watt bulb(2000lumens) on one side of my algae filter. Will get another to put on other side soon when money comes in. I have a 6inch fan blowing straight down on the filter as well. For my overflow I have my pumps setup so if one goes off or both they will only drain about 3-4inches. Like I said first time see how it goes and just put it together last night. With everything about $50. Let me know what you think and how I could better the system. I need to get a holesaw bit and scrap up my filter today. Thanks