keeperofthefish
New member
Honestly, Dynamat is not what you want. It is made to reduce low frequency rattle as it resonates through metal--not the high frequency sound of fans, pumps, etc. If you've ever heard a car driving by that sounds like a tin can with an egg beater in it, that is what Dynamat is designed to absorb. I don't know a lot about acoustics, but it seems to me that you want the acoustic paneling like cerreta recommends, which is also a lot cheaper. I am certain that it would become somewhat caked with salt, etc., but could likely be wiped clean. It is unlikely to deteriorate very quickly. It sounds like the T4 is great if heat isn't a concern. I am a bit wary of any spa pump because it is unlikely to have been designed to hold up in a marine environment. The Dolphin, on the other hand, is known to hold up quite well in a marine environment. If price is an issue, it sounds like the PanWorld is the way to go.