how bout we ask this: what else do you plan to have in the tank?
I see waterbug in the seahorse forum, I believe... which would make me ask this. WHY? a maxi-1200 would be ALOT of flow for seahorses, and you'd need a spray bar setup to diffuse the flow over the whole tank...
softies can live and even thrive in low flow tanks... with or without a sump. right now, the only softies in my tank not doing well because they aren't in good flow are xenia. Zoanthids and shrooms do fine in low flow situations. low flow=almost none, btw