You wont need much flow on those sm reactors. I have a MJ1000 running the 2 of mine and its cut back a fair amount. Becasue of the phos media thats in there. If it was just carbon I could flow more. The MJ's are 1/2" so its a snap to hook up...like 5 min if you have the stuff lol. On a side note I got my MJ's from aquacave for like less than 20ea and one lfs sells the same for 42ea...no lie. And good to hear about the fx5. I went back and forth on those...one of them or the 2 xp3's.