De-rimming tips on a 33 gallon long... - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 12-31-2011, 04:55 AM Thread Starter
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De-rimming tips on a 33 gallon long...

I saw a 33 gallon long a Nebraska Aquatics the other other day. It is absolutely perfect for the Iwagumi scape that I want to do. I found a place online where I can get a rimmless one, but it would cost me 170 dollars. Since I don't have 170 bucks to drown right now my other choice is to buy one rimmed for about 70-100 dollars and de-rim it my self. I feel fairly confedent that I can ocoplish a successful de-rimming with the right knowledge and tips from you guys. I know the largest you can tank you can de-rim with almost completely garenteed success is 20 gallon. I know some of you have done larger with success, but there is also a high failure rate of derimming for the larger tanks. So, my first question: Can I de-rim a 33 gallon long with about the same success as de-rimming a 20 gallon?
My second question: A 33 gallon long is 48 inches long. The ones that are rimmed have a center brace. Will I need to make a center brace once I de-rim so it will not brake the glass when I flood the tank or can I get away with out a center brace?

ANY other tips and recommendations are GREATLY appreciated!

Thank you in advanced!

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post #2 of 7 (permalink) Old 12-31-2011, 05:33 AM
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Maybe someone will have some better insight on larger tanks, but, I personally wouldn't recommend it. The glass is not thick enough to hold the weight of the water. You'll see the glass bow under the pressure as you fill it up. Even my derimmed 10 gallon bows quite a bit and I'd be scared to derim anything bigger. Even if you do go for it, it's a pain in the rear, you'll spend hours scraping excess silicone off and cleaning up the poor seams. It took me about 15 razorblades for my 10 gallon. It also leaves a raw, unsanded glass edge. I have cut myself up pretty bad moving the tank around.

If I could do it again, I'd go with the Mr. Aqua and at least have the confidence that my tank was made to be rimless A $170 tank is going to cost you far less than what you'd be paying if the tank integrity failed and ruined your flooring and killed all your fish.
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post #3 of 7 (permalink) Old 12-31-2011, 06:33 AM
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I only see two options in this situation:

1. build more than enough braces, but still be at risk. LEAVE the bottom rim on.

2. or save up and buy the tank built to be rimless.

I wouldn't derim larger than a 10 gallon as well, although pepole have done 20 gallons perfectly fine.

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post #4 of 7 (permalink) Old 12-31-2011, 09:33 AM
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option #2

Ive only derimmed a 2.5 tho (petsmart sold it to me for $5 because the rim was cracked) and it took forever


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post #5 of 7 (permalink) Old 12-31-2011, 04:49 PM Thread Starter
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Ok, here is what I have planned. De-rim ONLY the top. Build at least three braces that will split the tank into 3rd's. Build the stand to cover the bottom rim.
If I do this then I should get the rimless look that I want and the strength that is required to hold the tank together.
Tell me what you think.

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post #6 of 7 (permalink) Old 12-31-2011, 05:11 PM
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Quote:
Originally Posted by Elliot View Post
Ok, here is what I have planned. De-rim ONLY the top. Build at least three braces that will split the tank into 3rd's. Build the stand to cover the bottom rim.
If I do this then I should get the rimless look that I want and the strength that is required to hold the tank together.
Tell me what you think.
how thick is the glass? what are the dimensions of that tank?
I derimmed a 75 and it is still going strong after a year, with no braces.

Here is the link to it

I would take the top rim off and fill it with water, and measure how much the glass bows. On those measurements you can decide if you want to play safe or just don't care about the bowing.

I would give the tank a couple of weeks test phase outside, just to be sure, I left my tank outside filled for 5-6 months


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post #7 of 7 (permalink) Old 12-31-2011, 06:17 PM Thread Starter
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I'm not sure how thick the glass is because I don't have the tank yet. There are aquarium glass thickness calculators on the internet that I'm not sure how to use. The dimensions are 48 1/4 x 12 3/4 x 12 7/8 (LxWxH)

I've already look at your 75

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