Seahorse Setup ???

I am currently designing a personal seahorse/pipefish tank, I wanted to hear any comments on my purposed setup, and any suggestions that would make it a better setup.... Thanks

So far the planned tank is limited in size to a footprint of 16"x16", as for height I was leaning towards a 30" tall tank, I know its a bit a a pain to clean but Im not too concerned with that. I was planning on having a 2"PVC overflow in the center of the tank with a 1/2" or 3/4" return going up the center of the overflow as well as a waterproof power cord for lighting. Im trying to figure out how much return circulation flow I should run, the tank would be about 33gallons, what are your opinions??? mag7, mag9, or mag12 ??? I was thinking that having the return plumbing split into 4 loc line returns would slow down the current enough while maintaining good flow rates, any input is appreciated... Around the 2"PVC overflow I was going to zap strap live rock all around it and make it look like a pillar of rock, will have a few seahorses and pipefish, and probably some macro algaes and sea grasses, along with some zoos. Given the small canopy dimensions of less than 16"x16", what lights would you recommend to light it up nice? Any suggestions would be great...
Thanks: Kyle