Hhi guys and gals as you can see from my pic this is my 20 gallon reef tank with 4 sps corals i am running a single vortec mp 10 what i am wondering is would it be worth while investing in another vortec for extra flow and any sugestions on the placement of my corals are welcome i am useing a arcadis luminare with 2 t5 bulbs one dayloght white and the other atintic blue as all replys welcome thank's gang ....?