There is no need for halides unless you're going with high light corals. T5s will be just fine for fish and some basic corals. In fact there are people using T5s on high light coral tanks. Using halides on your tank will be a huge waste of electricity imo, as well as increased top up, and increased humidity in your house. For saltwater 78 degrees is a good number to aim for.
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~ Mindy
SPS fanatic.
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