To easily maintain SH, the tank should not be large. Smaller the display tank, the easier to concentrate food and feed them. SH are not strong swimmer, nor do they exhibit "cruising" behavior. Large tank is not an requirement. Their tank should be relatively calm and lighting is not important.
However, If I have the chance to start over again, I would setup a smaller display tank 20Gal or less connected to a larger Refugium (37Gal +). Large water volume is critical to provide pristine water quality, and lush rate of reproduction of pods and zooplankton are essential for SH's survival. The display tank should have brightly colored "hitching posts" for them to grab on. I would recommend brighly colored gorgs or sponges (heh, keeping them is another challenge too.....). SH has ability to change their skin color to somewhat match the environment. So, if they are provided with brightly colored environment, their color will brighten up accordingly.
SH has short digestive tract, thus some food may not get thoroughly digested. It is imperative that you make sure your SH gets fed often. It is also very important that you train yours to feed on enriched frozen mysis to ensure their long term survival.
If you keep female and male together, you should also prepare a third tank ready to go as nursery tank for the baby SH. SH may eat their new born if they are really hungry. Baby SH should be fed newly hatched BS or rotifer, enriched.