I would keep the mushrooms and zoanthids on the bottom and away from the rocks that the SPS are attached to so they cannot grow towards your SPS colonies.
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120 gallon mixed reef, 30 gallon refugium, two 250 watt Phoenix 14K DE metal halides, four 65 watt Actinic power compacts, AquaC EV-120 protein skimmer, Mag Drive 12 return pump, two Hydor Koralia 4.
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