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Rock Setup
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Dr. Zoidberg
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Joined: 15 Aug 2003
Location: Australia

PostPosted: 2003.08.26(Tue)9:28    Post subject: Rock Setup Reply with quote

Hi guys.

I'm setting up a cichlid tank and am wondering, is it necessary to place some sort of support on the bottom of a tank that will contain a lot of rocks, to keep the rocks from cracking the glass? I've read that eggcrate is good, but I can't find it anywhere where I am (Australia). Could I use sheets of styrofoam, polystyrene or rubber instead? Will these deteriorate over time?

Thanks all.
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number6
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Joined: 07 Feb 2003
Location: Ontario, Canada

PostPosted: 2003.08.26(Tue)9:38    Post subject: Reply with quote

If you do not have reasonably sized gravel or sand as a substrate then points of pressure can be exerted on the glass. In that case I would use a sheet of styrofoam. If your substrate is gravel or sand then this step is completely unecessary.
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Dr. Zoidberg
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Joined: 15 Aug 2003
Location: Australia

PostPosted: 2003.08.26(Tue)9:42    Post subject: Reply with quote

Well, my gravel size ranges from 1-3mm, so that'd be OK? And I should put the base rocks in before everything right on the glass bottom, and then pour the gravel over and around them?
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number6
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Joined: 07 Feb 2003
Location: Ontario, Canada

PostPosted: 2003.08.26(Tue)10:19    Post subject: Reply with quote

cichlids, esp. African, dig. Egg crate is suggested to prevent the Africans from collapsing any rock structures and the resulting falling rock cracks the glass.

IME, I pour a thin layer of gravel, perhaps a 1/4 inch, then place rocks on that then fill up to two or more inches of substrate.
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Tommy
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Joined: 06 Feb 2003
Location: San Jose, CA

PostPosted: 2003.08.26(Tue)11:24    Post subject: Reply with quote

Another thing you can do is go down to your local plastic company (in California, it's Tap Plastics) and have a sheet of 1/4" plexiglass cut to fit the bottom of your tank. Silicone underneath it with a crosshatch pattern and you have an excellent protective layer...

With my last big american diggers, I got so tired of them exposing the bare bottom that I had the idea of spreading silicone on top of the plexiglass then pouring dry sand over it to create sort of a "carpet" under the gravel. I never did it, but I thought about it...
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arbo
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Joined: 27 Aug 2003
Location: High Point, NC

PostPosted: 2003.08.28(Thu)20:49    Post subject: Reply with quote

I used lace rock in my cichlid tank. On the points that touch the glass I applied aquarium sealant/caulk and let dry. Then the rest of the rocks are stacked on top of the first layer. Works really well. I also have a few lone rocks that just sit on the gravel which has caused no problems. I arranged the rocks on a flat surface to find the points that would touch the glass.
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