If it were me I'd like to know if the rock will leach any nutrients into the water.
If yes, then I'd add slowly over time placing about 10-20lbs in at a time while the rest is in a brute container curing.
If no, then I'd add all at the same time and scape once.
I'd be willing to bet you wont have a leaching problem with this rock.
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90g Mixed Reef
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