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#3
12-25-2010, 03:18 PM
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I had my seastar tank on foam, and they were the ones who recommended it was put on foam and they even suggested pink.
now the biggest problem I see is if you are using a home made stand or even a pre-made stand on an uneven surface. once the foam is compressed it won't keep going so what happens is it will conform to the stand and transfer through any irregularities. it will make up for very slight ones but not for larger ones and they will eventually telescope through and have there effects. I don't know if your stand was wood or metal but, I really hate it when I see people using wood to build frames for large tanks, as no matter how good you build it wood will flex and wood also will compress at different rates due to grain structure and knots, so in fact you can have a perfect wood frame compress at different rates causing unevenness and tank cracking. Steve
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 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*Some strive to be perfect.... I just strive. 
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#4
12-25-2010, 03:21 PM
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Brad
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#5
12-25-2010, 03:34 PM
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The foam on all tanks should only be max 4" wide around the perimeter of the tank, allowing the center of the bottom glass to float.
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#6
12-25-2010, 04:03 PM
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So what if you have a tank that has the trim and you have holes drilled down the center of the tank for returns?
Not sure if the tank has a floating bottom yet but with all the rock that is going to go in it and sand how do you support the glass so it does not break from where the holes are?
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Feed the bear goodies, make a new friend, don't feed the bear............... 8' - 165gal Reef DIY LED's Build 2012 Nano Contest Winner Febuary 2013 POTM Winner 300 gal + 60 gal Complete DIY Build
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#7
12-25-2010, 04:32 PM
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Quote:
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"Rules are for the obedience of fools and the guidance of wise men."
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#8
12-25-2010, 04:51 PM
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I've googled all morning, and what I am finding is.. Never put foam under a rimmed tank. A rimmed tank is designed so that the weight of the tank sits on the rim, which displaces the weight up the sides vertically. makes sense, as glass it strong vertically and weak horizontally. IF you put a rimmed tank on styrofoam, the weight bearing edge will compress into the foam until the glass is being pushed down onto the foam, your now messing with the design intent and instead of all the force of the weight being transferred vertically up the sides, it's also pressing up on the glass bottom which eventually cause it to flex, and as I know only too well, horizontal glass doesn't flex well when the corners are being pinned down by over a 1000lbs of water and rock.
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"Rules are for the obedience of fools and the guidance of wise men."
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#9
12-25-2010, 05:06 PM
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 I don't get how the styrofoam under the tank would be a bad thing. If the glass is supported, then it's supported and should be stronger. I can see if the supporting structure is uneven or warped, then you would have a problem. Mitch
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#10
12-25-2010, 05:11 PM
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Quote:
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"Rules are for the obedience of fools and the guidance of wise men."
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