Quote:
Originally Posted by chatyak
Are you sure you want the mp40s? I have them and the noise drives me crazy. I've replaced the parts on them a couple times too already. I use Tropic Eden sand and found it to be much better than any CaribSea brand. It is more uniform, clean, white, and I find it heavier by not getting blown around, even on the smaller particles. You'd have to turn down the power on the pump that close to the sand though - maybe not if you used a bigger size, such as ReefFlakes.
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I don't hear any noise out of mine. I don't use the pulse mode to create the wave though, which you do hear a little bit of a hum as it does its pulses. Have you made sure your spacer is set according to your glass thickness and you can also move the wetside around a bit if it's a vibration noise.
Either way, I love my Vortechs!