You still didn't mention anything about parameters...one of the most important determining factors in whether your tank is ready to sustain corals or not.
Canisters are nitrate factories when used with media or any kind, as they cause huge biological filtration, and that produces nitrates. Not a big deal with freshwater aquariums, but a big issue with reefs. You're best off filling it with live rock rubble.
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~ Mindy
SPS fanatic.
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