Question about tank rim - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 10-23-2006, 08:25 AM Thread Starter
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Question about tank rim

What is the main difference between a rimless tank and one with the standard black or woodgrain trim? Is there just extra silicon reinforcement on the rimless tanks? Has anyone ever tried removing it, or would it be a bad idea?

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post #2 of 9 (permalink) Old 10-23-2006, 08:34 AM
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there is a difference in glass thickness, but im not sure how exactly that impacts durability of the tank construction though.
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post #3 of 9 (permalink) Old 10-23-2006, 04:27 PM
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Based on what I have been reading here, the tanks with rims don't have well finished top edges. So, when people remove the rim they find rough, uneven top edges of the glass. Unless the rim is made of metal, such as stainless steel, and has a wide flange at the top, it isn't contributing much if anything to the strength of the tank. Glass is a very strong material, brittle, but strong. I suspect the rimless tanks cost more because of the extra care and effort it takes to get a good finish and even edges at the top, but not because thicker glass is used.

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post #4 of 9 (permalink) Old 10-23-2006, 06:54 PM Thread Starter
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Well, I certainly wouldn't want my arm to get all cut up when its draped over the edge into the tank. The rim on my tank is black plastic. I guess I'll just leave it alone. Thanks!

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post #5 of 9 (permalink) Old 10-24-2006, 09:30 AM
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Quote:
Originally Posted by Hoppy View Post
Unless the rim is made of metal, such as stainless steel, and has a wide flange at the top, it isn't contributing much if anything to the strength of the tank.
What about on a 55 gal? You know it has the center support piece in the middle? I read somewhere that contributed to the strength of the tank and you shouldn't remove it. Thats just what I read, doesn't mean it's true...what do you think Hoppy?
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post #6 of 9 (permalink) Old 10-24-2006, 09:46 AM
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You shouldn't remove the center brace...ever. Unless you re-inforce it with something else. Personally, I'd be worried that 55 gallons of water is sitting over my carpet and living room without a brace. =P
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post #7 of 9 (permalink) Old 10-24-2006, 05:08 PM
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I suspect the rim is also used as an aid in building the aquarium. Fit and finish take time and effort.

58 gallon oceanic, Kessel 360 tun sun, pressurized co2, eheim pimp #179 - 2217 and diffuser
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post #8 of 9 (permalink) Old 10-24-2006, 05:53 PM
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I've got a black plastic rim and a center brace on my 3g Eclipse, although I believe my center brace is more designed for holding up the filter than giving the acrylic any additional support. It makes it a pain to clean, though. That's for sure.
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post #9 of 9 (permalink) Old 10-24-2006, 08:48 PM
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Quote:
Originally Posted by ringram View Post
What is the main difference between a rimless tank and one with the standard black or woodgrain trim? Is there just extra silicon reinforcement on the rimless tanks? Has anyone ever tried removing it, or would it be a bad idea?
I recently ordered a replacement Perfecto rim with the frame built into it.
The 2 center braces for my 220 cracked and the 3 glass lids and 2 double strip lights fell into the tank. I don't know how much reinforcement there is for the rim to be on there...maybe it's just for looks but just like what everyone said, just don't remove the center braces if the tank already comes like that.
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