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Old 04-17-2007, 08:50 PM   #1
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Placing rock on PVC?

I read a thread once where rocks were installed on top of a PVC frame. I cannot remember the thread and wish I'd bookmarked it. I read another where 1 1/2" PVC lengths were cut 1/2" to 1" taller than the sand bed. Holes were drilled into the PVC and they were placed down in the sand bed so that a 1/2" to 1" was sticking out. The rocks were then placed on top of the PVC pipes. Rocks sitting on top of egg crates, on the tank bottom with the sand added afterwards, and rocks placed directly on top of the sand beds.

I'm looking for the best installation of rock. Any ideas/suggestions/reccommendations? What's the best way? I want to hear how everyone has installed their rock.
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Old 04-17-2007, 09:00 PM   #2
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I remember that PVC post also. I'll poke around later tonight and see if I can find it. The point was, if I remember right, to not make any "dead" spots under the rock.

Personally, I put my rocks on the bottom of the tank - bare glass - and then put in a 3" sand bed. With the way I did my aquascaping (a couple "towers), I did NOT want to risk the chance of a rockslide.

Not sure you'll find a "best way". I think this is like that "what's the best salt" question!
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Old 04-17-2007, 09:40 PM   #3
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I just put mine on top of the sand and pushed it down and then stacked rock on top giving it the pressurized finger test to make sure it was steady.LOL I do remember that post though
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Old 04-17-2007, 09:46 PM   #4
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Yes, I believe the idea was not to have any dead spots under the rocks.
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Old 04-17-2007, 10:03 PM   #5
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If you have an acrylic tank you can use acrylic rods as posts to hold up live rock in any formation you see fit.
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Old 04-17-2007, 10:31 PM   #6
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Tank is glass.
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Old 04-17-2007, 11:09 PM   #7
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My rock is on top of my sand bed...I just wiggled the base rocks a bit to get them into the sand and then went from there....
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Old 04-18-2007, 10:14 AM   #8
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Either way (PVC or sitting on the glass) is fine IMO. Point is to keep it from coming down by providing a stable base.

Here is the link to the article:

Raising Rocks Off-the-Bottom of the Tank
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Old 04-18-2007, 11:29 AM   #9
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I actually just built a PVC frame for my LR. I didn't drill any holes in it since I used a lot of it (about 10-12 feet of it) and was concerned about water getting in there and becoming stagnant. Keep in mind, the sealed PVC WILL float, so it makes it a little harder to work with and needs to be weighted down. I am planning on attaching the rock with plastic zip ties (don't get the ones that have metal in them). I just made a random looking frame. I will have a post as soon as I am done adding the rock.
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Old 04-18-2007, 04:37 PM   #10
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Quote:
Originally Posted by roka64
...I am planning on attaching the rock with plastic zip ties (don't get the ones that have metal in them).
Oooooooooh... you're right - some of those DO have little metal tabs in the clicker part. I'd never thought of that. Glad I never used the bag I bought when I aquascaped as that never even crossed my mind.
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