Large rocks on glass - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 11-09-2012, 09:14 PM Thread Starter
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Large rocks on glass

When placing large rocks is it ok to put them on the glass or should i put aqua soil down first to protect the glass? Here's the scape the tank will be a cheap 29g tall. Im worried about the second rock from the the right side.
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post #2 of 7 (permalink) Old 11-09-2012, 09:46 PM
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I put some substrate down first, but I only work with nano aquariums.

If the rock is particularly large, you can use some egg crate to spread out the weight more evenly.

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post #3 of 7 (permalink) Old 11-10-2012, 07:04 PM Thread Starter
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The egg crate doesn't sound bad. Maybe something plastic like a wall of a milk crate.
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post #4 of 7 (permalink) Old 11-10-2012, 09:30 PM
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Styrofoam will also work to cushion the rock. Substrate works in most cases and for a 29g I feel would be fine. As you get into heavier rocks though you should consider padding.

Substrate is afterall just small rocks for the most part and sitting a big rock on top puts pressure and stress on points of the bottom of the tank where the substrate presses. This can lead to cracks and disaster.
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post #5 of 7 (permalink) Old 11-10-2012, 09:42 PM
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When talking about egg crate I think people are talking about this :http://www.homedepot.com/h_d1/N-5yc1...1#.UJ7XB4be-jI
Which is plastic. Not a cardboard egg container.

The HD item is what I will be using when putting rock in my aquarium.
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post #6 of 7 (permalink) Old 11-11-2012, 07:15 AM Thread Starter
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Yeah i found it at homedepot.com as well, hoping lowes will have it in the lighting section.
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post #7 of 7 (permalink) Old 11-11-2012, 03:08 PM
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The eggcrate/lighting product is a good way to go.
For smaller rocks (if I can place them with one hand) I just cushion with substrate. But if I have to use 2 hands to control the rock, some sort of protection is a very good idea. All that weight sitting on just a few points on the glass does not seem safe.
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