The one that is not ticking is fairly silent. But they are much bigger than the 40's so they are louder. Actually right now i can hardly hear my 40's but the 60's are humming.
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360 gallon sps reef, 180 gal sump, bubble king supermarine 300, 4xmp40Wes, 2 x 6215 tunze waveboxes, 4 ghl mitras
360 Reef Tank
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