Protecting glass when using heavy rocks? - The Planted Tank Forum
 
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post #1 of 12 (permalink) Old 08-09-2008, 04:49 PM Thread Starter
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Protecting glass when using heavy rocks?

I am finally getting a chance to do an actual scape in my 75g tank. I've picked out some pretty heavy, large rocks that I think are granite. The largest rock is 13 lbs.

It has a flat bottom, but I'm considering adding some other rocks below it (attached using waterfall foam) to give it some more height.

Should I be concerned about the weight of the rocks, pressure points and all being a potential problem with the glass? When I move my tank (in the next couple of months), I want to add some egg crate at the bottom just for extra insurance, but in the meantime, I want to try out my scape to see how I like it.

Should I worry about the heavy rocks or should they be okay? Anything that's stacked will be firmly attached using waterfall foam so the fish cannot cause the rocks to fall. It's more a matter of so much weight in the middle of one side of the tank that's concerning me.

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post #2 of 12 (permalink) Old 08-09-2008, 05:08 PM
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I would consider using egg crate, the kind that you buy in the lighting dept at Lowes or Home Depot. It will help take the weight directly off the bottom glass.
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post #3 of 12 (permalink) Old 08-09-2008, 05:20 PM Thread Starter
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Yes, I'll definitely be adding egg crate when I move my tank (in a month or two). But I don't want to wait until then to try out the rocks.

So I'm checking to see if it's okay to add the rocks now without the egg crate or is that a recipe for disaster?

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post #4 of 12 (permalink) Old 08-09-2008, 05:25 PM
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Get the egg crate now,and you will have it when you move.
Why take any risk?


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post #5 of 12 (permalink) Old 08-09-2008, 05:28 PM Thread Starter
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If I get the egg crate now, I'd have to really stir things up in the tank in order to get the egg crate below the substrate. That's why I wanted to see just how much of a risk I'd be taking.

If there's little to no risk, then I'll add the rocks now. If there's a genuine risk, then I'll wait until I get an egg crate put in. Unfortunately, that would mean holding out for a couple more months. Still, waiting is far better than busting my tank!

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post #6 of 12 (permalink) Old 08-09-2008, 10:12 PM Thread Starter
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I thought I'd also mention that the total weight of the rocks is 40lbs. I'll be attaching some other rocks on the bottom of some of the main rocks to raise their height. I'll attach them using waterfall foam which creates a strong bond.

Do I definitely need to wait until I get an egg crate installed before putting the rocks in? Is the risk that of the rocks falling or of their actual weight being too much for the glass bottom?

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post #7 of 12 (permalink) Old 08-09-2008, 11:10 PM
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post #8 of 12 (permalink) Old 08-09-2008, 11:58 PM
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A 13# rock? That's nothing. I'm starting to think you're a tank-ochondriac (excessive worrying about your aquarium).

Just an FYI: Egg-crate only aids in removing pressure points (heavy rock pile in one spot, or drops), not in increasing load carrying capacity. It is nonsense when considering a 13lb. rock over substrate or 40# total.


Haven't you ever seen an African Cichlid Tank before?
Here's >200# in my 75g...several 25#ers in there.


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post #9 of 12 (permalink) Old 08-10-2008, 12:17 AM
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Quote:
Originally Posted by Orlando View Post

Wow 220lbs on the bottom glass of a standard ten, nice.
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post #10 of 12 (permalink) Old 08-10-2008, 12:24 AM
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Cool HUH!
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post #11 of 12 (permalink) Old 08-10-2008, 01:06 AM
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Cool HUH!
ya braver than i am though
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post #12 of 12 (permalink) Old 08-10-2008, 03:53 AM Thread Starter
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Quote:
Originally Posted by Orlando View Post
Thanks for the video link, Orlando. That was pretty amazing.

Quote:
Originally Posted by macclellan View Post
I'm starting to think you're a tank-ochondriac (excessive worrying about your aquarium).
You're just starting to think that? What took you so long!

Quote:
Just an FYI: Egg-crate only aids in removing pressure points (heavy rock pile in one spot, or drops), not in increasing load carrying capacity. It is nonsense when considering a 13lb. rock over substrate or 40# total.
Okay, this is what I needed to know. Thanks!

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