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 03-01-2013, 08:02 PM #16 Indychus Planted Tank Enthusiast     PTrader: (8/100%) Join Date: Feb 2013 Location: Irmo, SC Posts: 652 I neglected substrate weight in my calculations, but it doesn't make much of a difference. The weight of water is 62.4 lb/ft^3... Depending on the soil, it could be anywhere from 55-100 lb/ft^3. Most calculations I have seen, say for a 55 gallon, calculate the weight of 55 gallons of water, then the weight of the substrate, and add them together. This is not accurate, since the substrate displaces an equal amount of water. So you would only add the difference in the weight of the water and soil. Say the soil is 100 lbs/ft^3, so you only add 37.6 lbs per cubic foot of soil added. In a 55 gallon tank (4ft x 1ft) with 3 inches of substrate (1 ft^3), you're looking at 462lbs of just water, or 500 lbs with substrate. The extra ~40lbs is negligible.

 03-01-2013, 08:23 PM #17 MABJ Invert Warrior     PTrader: (14/100%) Join Date: Mar 2012 Location: NY Posts: 3,883 Tank too big for its stand? On the real matter, there was actually a video of someone taking a standard tank and putting it on blocks, stacking stone in the middle then standing on it. It didn't break. Over time though, I doubt that would work. Something to consider. __________________ |Mossy Bonsai|Almost ADA|DBP Loonnng|CRS Spec| |My Tanks ʌ | Shrimp advice v| |Essential tools|List of inverts|Sage advice|Truth About Snails| Mark A Belcher Junior, founder -- DBP Club. Last edited by Darkblade48; 03-01-2013 at 10:43 PM.. Reason: It is unacceptable to insult another member.
 03-01-2013, 09:18 PM #18 ADJAquariums Wannabe Guru     PTrader: (3/100%) Join Date: Jul 2012 Location: Albany, New York Posts: 1,444 The thing with the four corners though is over time wont the glass and edging in the middle bow and result in a broken bottom? __________________ "Obviously you're not a golfer." -The Dude Last edited by Darkblade48; 03-01-2013 at 10:47 PM.. Reason: Commenting on insults made by another user. Offending users have been dealt with.
 03-01-2013, 09:51 PM #19 Couesfanatic Wannabe Guru     PTrader: (31/100%) Join Date: Sep 2009 Location: AZ Posts: 1,905 I realize that. But bringing up random stuff like that is just asking for arguments. The issue is with the weight not being supported evenly. Glass is rigid, yet fragile. If torsion is placed on the glass, breaking is an issue. Level out the tank and have it supported evenly throughout, as much as possible. __________________ DBP Club #18
 03-01-2013, 10:26 PM #20 Coltonorr Many plants...little time     PTrader: (66/100%) Join Date: Mar 2008 Location: Northern New Jersey Posts: 1,632 the glass on the bottom of any All Glass or such aquarium is not supported. Only the edges are supported. I used to manage an aquarium store back in the day. We only supported the long sides of the tanks. And on a few tanks, just the corners. So since I love hockey...the answer to the question of 4 hockey pucks on 4 corners, the answer is yes that would work as long as the 4 corners are level as was mentioned in post #11 __________________
 03-01-2013, 10:29 PM #21 thelub Newbie     PTrader: (15/100%) Join Date: Jan 2013 Location: SE Washington Posts: 1,981 I stand corrected Even still, I wouldn't setup a tank that was help up by 4 corners only nor would I suggest that to anybody.
 03-02-2013, 06:05 PM #22 Couesfanatic Wannabe Guru     PTrader: (31/100%) Join Date: Sep 2009 Location: AZ Posts: 1,905 Just because it works, doesn't mean you should. You could easily bump the tank, adding pressure at an abnormal angle, when the tank is already under stress. One bump or different pressure could make the difference. Why rest it on the corners when there is an increased chance of breaking it? I don't see any benefit to doing this. __________________ DBP Club #18
03-02-2013, 06:32 PM   #23
evilhorde
Planted Member

Join Date: Feb 2012
Posts: 171

Quote:
 Originally Posted by Hoppy You could use a double layer, glued together, of 3/4" plywood, the same size as the tank, screwed and glued to the top of the table. I would worry about a single layer gradually bending down at the ends leaving only the middle supported.
I had something spring up that led me to use a small dresser to support a 45 gallon tank in an emrgency sort of scenario. the dresser is around 7 inches shorter than the tank. I used 1/2" plywood with 3 layers, glued and screwed to deal with the 3.5"+ inches of overhang at each end. This emergency temporary tank setup has evolved into my primary tank and has been full of water for a little over 6 months now with no ill effects. Aside from the stress related nausea I get when I look at what I have done, of course.

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