Rock Glue to hold rocks together? - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 09-16-2015, 07:44 PM Thread Starter
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Rock Glue to hold rocks together?

Can anyone recommend how to hold rocks together in an Aquarium.

I have some rocks, mostly lava rocks and I want to build like a mountain/cave for the fish however I don't want it to fall down during a water change or collapse on a scrimp.

Is there a way to hold the rocks together?

Aquarium safe silicone glue perhaps or maybe a product like
Fluval Sea Aquatic Epoxy Stick

or

Instant Ocean HoldFast Epoxy




Both these product have mixed reviews online say they don't really hold rock together that well.



Anything else I should try?


Thanks.
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post #2 of 11 (permalink) Old 09-16-2015, 08:02 PM
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I have used one of those sticks and it sucked I didint hold when I went to put the rocks in the tank a few of them fell off

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post #3 of 11 (permalink) Old 09-16-2015, 08:03 PM
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I'm not sure how it would do with all the holes in lava rock either

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post #4 of 11 (permalink) Old 09-16-2015, 09:17 PM
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Use Thorite or Hyrdrolic Cement if you want it really strong. If you use epoxy, make sure it is resin and not putty.
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post #5 of 11 (permalink) Old 09-16-2015, 09:31 PM
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I used DAP Aquarium safe silicone when I wanted to hold together my slate pieces. Comes in a little green tube.

http://www.dap.com/product_details.a...67&SubcatID=27
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post #6 of 11 (permalink) Old 09-17-2015, 01:02 AM
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Quote:
Originally Posted by miogpsrocks View Post
Can anyone recommend how to hold rocks together in an Aquarium.

I have some rocks, mostly lava rocks and I want to build like a mountain/cave for the fish however I don't want it to fall down during a water change or collapse on a scrimp.

Is there a way to hold the rocks together?

Aquarium safe silicone glue perhaps or maybe a product like
Fluval Sea Aquatic Epoxy Stick

or

Instant Ocean HoldFast Epoxy




Both these product have mixed reviews online say they don't really hold rock together that well.



Anything else I should try?


Thanks.
Check out this product. http://www.polygem.com/products/zoopoxy/
It's the stuff used by Wayde King and Brett Raymer owners of http://www.acrylicaquariums.com/show.html
You may have seen their reality show, Tanked.
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post #7 of 11 (permalink) Old 09-17-2015, 01:06 AM
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Dow 795 adheres to most rocks and slate.

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post #8 of 11 (permalink) Old 09-17-2015, 05:36 AM
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GE II silicone for windows/doors works too... comes in many colors. Just have to let it dry for at least 24 hours, probably more.

DIY Enthusiast


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post #9 of 11 (permalink) Old 09-17-2015, 06:20 AM
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Or pre-drill your rocks, and use those rail bolt fasteners...(SS)
Not gonna work on soft rock.
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post #10 of 11 (permalink) Old 09-17-2015, 02:15 PM
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I've used generic 100% silicone from the hardware store to hold Lava rocks together. It works VERY well if you are just holding them to one another under water. It does not create the strongest bond as far as moving it goes.


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post #11 of 11 (permalink) Old 09-17-2015, 03:31 PM
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As mentioned above, it is better if you can let it cure while dry rather than doing it in a wet tank.
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