Hey guys, I'm currently cycling a 10g in preperation for an early christmas gift for myself. I'm going for a macroalgae/mangrove biome with some 6500k leds, and I'm mulling over 3 species: G. vidiris, G. smithii, and N. wennerae. I'm leaning towards N. wennerae, but could use some help on deciding. I'm looking for a small but active species. Also, would a mantis wreck brittle stars or urchins? I'm thinking of having at least one sorta permanent cuc member in the tank.