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Old 04-17-2012, 09:53 PM   #1
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This is my step by step. It was before I knew there was a dedicated "DIY" section

Diy Rock Project


Here are my pieces, to date.



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The problem- I started this project using sanded grout and I love the look, BUT, after building-up many layers, my "rocks" are taking on water (when I submerge them, tiny bubbles come out of a few different areas on top of my "rocks").

I know NOW that I should have started with a few layers of JUST cement, since it is impervious to water. The sand seems to have allowed for voids and weaknesses, where the air from inside is able to break through, once pressure builds, as the result of submerging the hollow structures.

If I could add more layers of cement and grout, I would. I have built it up too much now and would be closing some of my smaller holes. Any tips on epoxy? Experience with similar problems and your solutions? Thanks
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Old 04-17-2012, 11:28 PM   #2
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Those are some nice pieces good job
Wont it stop after while with the bubbles? Or are you just worred about it taking in water
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Old 04-17-2012, 11:31 PM   #3
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Quote:
Originally Posted by Andrew McFadden
Those are some nice pieces good job
Thanks a lot. It would be awesome if I could seal them and put them in my tank

I wouldn't mind epoxy, at this point, but I definitely don't want any "yellowing"

I used rusty iron plates as counter weights, so I don't want that getting into my water. I also used 2 questionable adhesives to glue the foam together. That is why I need it to be fully sealed. I should have mentioned that
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Old 04-17-2012, 11:39 PM   #4
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I used a epoxy resin on my background I got it at a boat shop but don't remember what it was called
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Old 04-17-2012, 11:41 PM   #5
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Quote:
Originally Posted by Andrew McFadden
I used a epoxy resin on my background I got it at a boat shop but don't remember what it was called
How long has it been since you coated it? Has the epoxy yellowed any?
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Old 04-17-2012, 11:44 PM   #6
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Home Depot sells a 2 part epoxy resin that is aquarium safe once its dry - unfortunately since I've only coated rock and foam with it I can't really tell you if it yellows.
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Old 04-17-2012, 11:47 PM   #7
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How long has it been since you coated it? Has the epoxy yellowed any?
Its been in my tank for several months now and my water is crystal clear
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Old 04-18-2012, 12:06 AM   #8
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Its been in my tank for several months now and my water is crystal clear
Actually I think he's referring to the epoxy yellowing the stone not the water, but I could be wrong.
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Old 04-18-2012, 12:13 AM   #9
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Actually I think he's referring to the epoxy yellowing the stone not the water, but I could be wrong.
I didn't think of that
I wouldn't know about that cause I covered quickrete mixed with a dark and redish color
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Old 04-18-2012, 12:21 AM   #10
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Quote:
Originally Posted by Wy Renegade

Actually I think he's referring to the epoxy yellowing the stone not the water, but I could be wrong.
I actually meant yellowing from light and age...like certain acrylic sheets would? At this point I'll go for it regardless but I would buy something "non yellowing" first. Ya know?
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