ok so i have posted before about this and i have seen other threads on it but its just alot of money so want to make sure im making the right choice. so i have a 90 bow front reef tank. right now i got 2 K4 and 1 K1 powerheads. i want to switch to a ecotech.... should i get a mp10 and maybe still run 1 or 2 of my K still on otherside of tank(because mp10 is cheaper) or should i just buy the mp40. if the mp10 will work fine and have enough flow would go that route to save money. if not and the mp40 would be the right match then would go that route if needed. any help?