03-20-2009, 01:56 PM
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I can`t say thats true. I have two Koralias a #2 and #3 they are quiet. The #3 i`ve only had for 2 weeks but the other one was in use when I bought the tank used from a guy who had it in the atleast a year and it does`nt make noise either. The only noise that I ever had was when I had water in there I rockscaped the tank then put sand in without already having the Koralias on and when I started tham they madde a sound for a second or two kinda like and there probably was sand that was in the moving parts but like I said it was a short period of time. As far as I`m concerned I like them, there quiet and will stick with them. Hope that helps? How big is you`r tank?