I am preparing to spread my wings and venture into seahorses (mostly likely reidi or erectus). I do have a couple basic questions about set-up. First of all, I have a 55g (48x18x20) tank available and a 30g tall (24x12.5x 25). I know a taller tank is better but any opinoins for which would be better? either tank will have refugium and sump. another question is about flow and more important how the flow is dispensed. do they need spray bars through out the tank via a closed loop system or would a standard return be good with pwerheads? i have a eco vortech mp10 pump, but i wasn't sure if it could hurt the seahorses. and the last question is about lighting. I was thinking about doing sea grass with some macros and sponges. My concern with the seagrass is the high light they require. are seahorses bothered by the bright light or is "not so bright" macro tank better. thanks.