hey, i am new to this and have a 12g with 17 lbs of lr and 20 lbs of CC. I bought premade water from the LFS so I wouldnt have to make my own. Also the LR was already cured and some pieces have lots of coraline alge on them. I have tested the water and everything looks perfect, so on the advice of a friend of mine who owns a fish store, i added 2 scarlet crabs. The tank has only been in place for one week. The crabs were added 48 hours ago and everything looks perfect. When do you recommend adding the rest of the clean up crew? Before or after I add a fish/coral (I wont be adding a fish/coral for another 3-4 weeks just to make sure everything stays okay).