Canopy Weight - The Planted Tank Forum
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post #1 of 8 (permalink) Old 07-18-2004, 12:49 AM Thread Starter
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Canopy Weight

Howdy folks... I've been looking round past threads but I don't think I could find the info I was looking for. What is the maximum weight a canopy should be?? How much can the aquarium support, i guess that kinda depends on size well mines a 50g. I bought some 3/4 poplar in various size to construct the top. I couldn't find any 1/2" at home depot. Will this be too much for the tank to handle.. do I need side supports?? Ideas
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post #2 of 8 (permalink) Old 07-18-2004, 01:21 AM
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Well I overbuilt mine for the 75g. Its about 50 pounds with everything inside. As long as you dont drop it on the tank edge I dont think there would be a problem having something 40 or so pounds on a 50. Try and make it as light as possible so when you do move it around it wont be heavy. Locating the ballest outside/away from the canopy helps.
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post #3 of 8 (permalink) Old 07-18-2004, 01:32 AM Thread Starter
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ya.. already debating taking back the 3/4" poplar and trying to find some 1/2" in the same size.. its only supports a couple balllast and reflectors... so doesn't need to be built nearly and strong as the stand. God forbid I ever drop that thing
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post #4 of 8 (permalink) Old 07-18-2004, 01:41 AM
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I think it also depends on if the tank has a center brace or not. An unbraced tank will bulge out slightly (I just built a canopy for a 33 gallon and measured - 36" long and 12" deep and it bulged 1/4" at the center). That would (I expect) slightly destabilize the tank for putting a heavy load on top of it. If you put a very large load over it, you might consider putting some thin legs on the canopy to let it hover right over the tank.

Right now I'm making a canopy for a reef that *is* center braced. I expect the thing will weigh a good 100 pounds when all is said and done (lighting, wood, plus a 10 gallon refugium on top) and I don't expect any problems. I'll report back if something explodes.
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post #5 of 8 (permalink) Old 07-18-2004, 02:21 AM Thread Starter
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alright.. well lets hope that never happens. My tank is centre braced so bulging shouldn't be a problem.
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post #6 of 8 (permalink) Old 07-19-2004, 04:26 PM
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I use 1x8 poplar for all my canopies. never had an issue. make 100% sure you check the plank for bending/warping in advance. people (like me) who don't work with wood very often will really end up in a bad place if your wood's too warped.
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post #7 of 8 (permalink) Old 07-21-2004, 02:24 PM Thread Starter
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Thanks all.. got the box built just need to screw it all together and attach the top. It fits the tank like a dream, that's why it pay to measure twice and cut once
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post #8 of 8 (permalink) Old 07-21-2004, 04:54 PM
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As long as your canopy isn't excessively heavy I think it should be fine. I have found that aquarium glass is quite thick and strong. The other day I accidentally dropped a wooden frame (made of 2x3's, 8 feet long) directly on my 35 gallon tank but everything seems fine.

Also have a pretty heavy wooden canopy on my 25 gallon, not a problem so far. It's made of 3/4" pine shelving cut into pieces.
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