Without posting what type of filtration you have there is no answer. I have a 120 and have a kole tang, purple tank, three clowns, two Hawaiian anthis, flame hawk fish, purple chromas, fairy rass. Fox face, three shrimp an orange spotted gobby and god knows what ells is living in my live rock. The tank has been up for close to two years and I have never had any nitrates. I have a protein skimmer rated for twice my tank size and I come close to doing weekly five gallon water changes. My fish and coral look great.
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