Guys, give me some ideas.....

I broke down my mini-reef about 1 month ago. I said to myself I will wait out the winter and start another project then. Every night I look over and I need to fill it back up ASAP. It's a 30 gallon with led white/blue lights(240watt),protein skimmer, bout 60lbs live (now dried out rock), and 1 small wavemaker. What do you think I can stock tank with? I had thoughts of seahorses, but I read I need to supply them with live brine cause they rarely eat frozen? I've had cichlids but always come back to salt. Piranha tank? Give me your thoughts . Thanks