Cork and Rubber

[gasbatalla]

will cork or rubber have an impact in the chemistry of the water?

[bertoni]

Cork will decay over time. If it's a composite cork or has been treated somehow, it might contain some dangerous chemicals. There are a lot of products called rubber. I don't know enough about them to say what kinds of problems you might have with them.

[ReefRatForums]

depending on what your using this for maybe the cork wont be so bad since its natural wood. And as for rubber i hope its ok because every water pump i have ever purchased came with small rubber feet.........but again there are diff types of rubber

[gasbatalla]

i am trying to find something to use to place it under the return pump to take away vibrations

[bertoni]

Okay, you might want to try some of the suction cups for pumps. They won't be toxic. I would avoid using other "rubber" products. One person used a mouse pad, for example, that did quiet the pump, but killed a lot of the tank. I might try a filter pad or two, as well.