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Old 07-31-2006, 10:07 AM   #1
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How to put small rocks together?

I have some fist-size rocks that I would like to put together to form a structure. They are all dry base rock. I was thinking cement, maybe? Don't want to use anything that is going to release chemicals into the tank, of course. Any suggestions?
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Old 07-31-2006, 10:23 AM   #2
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I used silicone sealant to make my waterfall.
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Old 07-31-2006, 10:35 AM   #3
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I'll second the silicone. Just make sure that it is pure silicone and not one of the versions with additives.
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Old 07-31-2006, 11:13 AM   #4
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I thought I'd tried that before and it didn't hold. I'll give it a shot to be sure.
Thanks.
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Old 07-31-2006, 06:01 PM   #5
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Silicone sealant will not stick to rocks the same way it sticks to glass, but will do the job. Make sure the rocks are clean, and as mentioned, get a silicone such as GE Silicone I for windows and doors. Do not use anything that says "tub and tile" or "kitchens and baths", as they contain mildewcides. GE Silicone II is also not recommended.
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Old 08-03-2006, 12:21 AM   #6
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Many folks use epoxy like this:
http://www.bigalsonline.com/edealinv...228&catLevel=0

Big Al's sells two versions of this stuff....in white and in grey as shown. I just bought some because I'm gathering information on how to build stone 'walls' by attaching small pieces of slate/stone to Styrofoam to create a tiered affect in one of my tanks.
I just created a thread in this forum, asking for some input on various ways to do this.

Len
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Old 08-03-2006, 02:49 AM   #7
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second vote for epoxy.
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Old 12-01-2006, 03:00 AM   #8
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third vote for epoxy!
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Old 12-02-2006, 03:52 PM   #9
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Epoxy is good for holding things together. I recommend silicone for watertight seals.
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Old 12-10-2006, 11:53 PM   #10
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I used silicone for my rock work and it worked well. The trick for me was to get a large glob of glue on each rock then mush them together, then immediately pull them apart then press them back together hard and hold for 10 seconds, then not mess with them over night. The next day I could then put completed sections together. The flater the surfaces the better they stuck together.
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