powerheads that can be attached to top of tank?

[805reef]

i am looking for a small powerhead that could be mounted to the top inside of my tank. i have a pennisula tank, and have 2 mp40w's mounted on 1 side about half ways up and would like to put this other smaller powerhead on the opposite side to put the surface water towards the overflow.

[mfinn]

I have a tunze 6045 attached ( with magnet attachment)to the euro brace on my tank

[undertai]

Mount one mp40 one each side of tank and move them up slow until the surface is being broken my the water movement. Or keep both on the same side and move one of them up closer to the surface of the water. Hope I explained that right.