I have both a Quiet 1 6000 and a Mag 12 and I'd say the Quiet 1 is quieter. It puts out more gph too. I'm happy with both.
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225g reef 3x250w MH 8x39w T5 Sfiligoi/ACLS, Deltec AP851, Deltec PF601S, Deltec KM500, Ozotech Poseidon, Aquatronica, Tunze TS48, Tunze Nanostream 6025s, Aqua UV 114w, MTC Ozone reactor, Cole Parmer peristaltic pump
67g reef, Euro-Reef RS135, 60g refugium, Mag 9 return, Tunze Nanostream 6025s, 4x39w T5
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