adding sea horses to tank

[isaac1]

hi guys within the next two weeks i plan on adding 3 sea horses to my tank i have no other fish except for a scooter blenny the sea horses i will be adding are all captive raised and descent size, my question is, i have two corallie power heads both 425 gph now should i remove one or is it safe for both of them to be running in the tank im just not sure because i have a varity of corals and will affect them if i do this