I use bio spira and have had success and i would say instant is kind of misleading. Its a major kickstart and you can add fish day one, but you can't go and fully stock your tank even with overdosing this stuff. You can add a fish or two but thats about it. And honeslty even though i use and love the stuff the fish i put in on day one or two wouldnt be an expensive one either, nor would i add a less hardy fish just in case. I would also continue to wait on corals for at least 30 days.
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