I restarted my 6 gallon nano cube, It has live rock, live sand, 1 blue legged hermit crab, 1 red scarlet reef hermit crab, 1 nerite snail, 1 nausarius snail, and a hawaiian feather duster. It's been on for 1 whole month. The rock is starting to get some nice purplish, redish, and greenish color...