suppliments: (as mentioned) are quick fixes, and like any other does not correct the prob, only set it back(this does NOT apply to vitamins or medications at all)
for the most part, IMHO, the only people i have seen(90% of em anyway), that really like the stuff and go thru the trouble to push it is someone who stands to profit, i am sure there are some others(but not a lot),my lfs loved the stuff, until he sold it to me, it did not do near what it was supposed to(in his words), costing him @300$
because not only did he accept full responsibility(at the advice of his marine biologist& breeders) but his breeder where he got the fishes from declined
responsibility needless to say, try and find a bottle on his shelf today
the stuff may HELP(but i could use my money elsewhere in a new tank), but it only helps
it does not always happen that way, but you cannot stock a tank fully or beyond capacity in 2 days, no matter how you do it, you still must go slow, this stuff may help to kickstart your bio filter, but will not grow it large enough for a lot of fish you still need to go slow, lr and a dsb has a faster recovery rate(after adding fish) once it is established