I use Smart Start to kick start the cycling process. The stuff is amazing!!! I used it for all my tanks and never had an issue. I always do the same process: ex. A 55 gallon tank: I buy the proper amount of live sand, I get one container of the ocean water ( the one in a box), a little bit of base rock( cleaned properly) some live rock( not too much), I too the rest off with salt water already mixed from my LFS
, and I dump a bottle of Smart Start. Before adding fish, I wait for the water to clear from the substrate. And I make sure the proper media is in my filter, along with some Chemi Pure. And I get the water tested a week or two later, and Voila!!!! and I have never lost a fish due to bad parameters.