If you are using sand, rock and water from the 90 I would imagine you would see little to no new cycle at all. Perhaps keep your livestock in the 90 for a couple days after you get the 50 going just incase there is a chemistry problem?
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- Greg
90G : Light - Tek 6xT5 | Skim - EuroReef RS135 | Flow - 2xVortech MP40W | Control - Reef Keeper 2
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