LR in the dark

[Myka]

I'd say you're gonna hurt the "good" algaes like coralline in probably about 3-5 days. Feather dusters and etc about 10-14 days. You won't "wreck" the rock though as long as you keep a heater and a good powerhead going in there. I know someone who has stored rock for almost a year that way, just "fed" it a pinch of flake food once a week, and it was good to go when it was put in the tank.