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post #31 of (permalink) Old 01-29-2013, 09:23 AM
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Join Date: Jun 2004
Location: Baton Rouge, LA
Posts: 3,349
Originally Posted by Hoppy View Post
A photo showing exactly what you are referring to would be very good
As you wish.

We don't need the airstones, just those clear plastic adapters inside. A cross sectional view of what I described:

Shoving that adapter hard into the tubing expands it a lot more securely against the edges of the hole, than just pulling tubing through a slightly undersized hole. The finished product:

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