
09-05-2012, 12:21 AM
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Catching the Bug
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Join Date: Sep 2011
Location: Upstate NY
Posts: 135
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In my experience, GS foam is very easy to remove if directly sprayed on the glass. Silicon is also easy to scrap away with a flat blade. Together (Gs foam on silicon on glass), I have no experience with. The general idea is that if you give yourself room to be able to get behind your work and GENTLY remove silicone/gs foam, you should be okay.
An example of complete loss: I have corkbark tile siliconed to the back of my tank. I wanted to replace one of them with a different styled tile, but could not get underneath it in any way. I have been unable to remove it. You MUST be able to get behind it, and you MUST be careful!
My previous tank configuration had a piece of glass siliconed over the previous owner's drilled hole. When I decided I wanted to make use of it (canister filter) I did everything I could to get that piece of glass up, but that silicon adheres like no other! Glass on one side of silicon is fine, but on two.... it felt like I was trying to drive the putty knife through a brick wall. I got it up eventually, but there were many glass shards, and some of the glass chipped away from the drilled hole.
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