new rimless 30 gallon tank - now what? :) - The Planted Tank Forum
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post #1 of 31 (permalink) Old 07-19-2011, 06:47 PM Thread Starter
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new rimless 30 gallon tank - now what? :)

i have a 30 gallon rimless tank (so excited!) but i have to figure out a way to put a clear (plexiglass?) top on it.

any tips you might have? it has to support the weight of my 7-8 lb cat possibly jumping on it - she is not the smartest! hopefully my 25 lb cat won't be so dumb... :S

thanks!
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post #2 of 31 (permalink) Old 07-19-2011, 06:57 PM
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plexiglass I would get 5/8 inch plexi and then build some sort of frame to go under it to support the weight of a cat.


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post #3 of 31 (permalink) Old 07-19-2011, 07:35 PM
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As Kamikazi said use 5/8 inch plexi for the top cut to the same size as the footprint of your tank. to support it bond four long "L" shape pieces of plexi to each edge on the underside of the top (they only need to be a few inches long). the long part of the inverted L will be against the inside rim of the tank on all four sides and the short part will provide an air gap for gas exchange.
kind of hard to explain but if done correctly the flat top will look as if it is floating above the tank slightly and will not slide off if your cat jumps on top of it. The cat will more likely slide off the top.

hope that helps
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post #4 of 31 (permalink) Old 07-19-2011, 07:45 PM
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Quote:
Originally Posted by robbowal View Post
As Kamikazi said use 5/8 inch plexi for the top cut to the same size as the footprint of your tank. to support it bond four long "L" shape pieces of plexi to each edge on the underside of the top (they only need to be a few inches long). the long part of the inverted L will be against the inside rim of the tank on all four sides and the short part will provide an air gap for gas exchange.
kind of hard to explain but if done correctly the flat top will look as if it is floating above the tank slightly and will not slide off if your cat jumps on top of it. The cat will more likely slide off the top.

hope that helps
pretty good description, do you have a picture or drawing for example purposes?

mindy, you can use silicone to bond the L's to the top piece. I would probably also do a straight strip in across the middle as a center brace for the top.

I use a 5/8 piece over my 29, when I do maintenance I flip it over b/c of the bowing. I still have a frame/rim on my tank so the plexi sits where the hood would normally rest.


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post #5 of 31 (permalink) Old 07-19-2011, 07:55 PM
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Quote:
Originally Posted by kamikazi View Post
pretty good description, do you have a picture or drawing for example purposes?

mindy, you can use silicone to bond the L's to the top piece. I would probably also do a straight strip in across the middle as a center brace for the top.

I use a 5/8 piece over my 29, when I do maintenance I flip it over b/c of the bowing. I still have a frame/rim on my tank so the plexi sits where the hood would normally rest.
Not able to upload as i am at work now (shhhhh don't tell anyone) bowing should not be a problem as the long L pieces across the front and back will brace the top, you will be effectively doubling the thickness at these points. you can ask the place that you get the plexi from for some bonding agent (or to do it for you) that way the joints should almost invisible.
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post #6 of 31 (permalink) Old 07-19-2011, 08:36 PM
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try this i hope it is clear this would be each side of the top the L only need to be a few inches long. 30% of the total length of each side should do it.
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post #7 of 31 (permalink) Old 07-19-2011, 08:42 PM
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Leave the plexiglass off and you should solve the cat jumping up there issue, lol..


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post #8 of 31 (permalink) Old 07-19-2011, 08:47 PM
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Leave the plexiglass off and you should solve the cat jumping up there issue, lol..
That was my first thought but Mindy did ask for a solution and not a problem
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post #9 of 31 (permalink) Old 07-19-2011, 11:45 PM Thread Starter
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thanks guys! this is fantastic

i was thinking i was going to have to attach blocks on the inside of the tank to support the plexi but that idea is way better. thank you so much!

robbowal, that is exactly what i was thinking i don't want my cat to go for a swim, or even to drink the water, because i wouldn't put that past her either! also, i would like to keep my betta from jumping out!
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post #10 of 31 (permalink) Old 07-19-2011, 11:46 PM
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Do you know the thickness of the glass?

I use these on my nano.. may work for you.




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post #11 of 31 (permalink) Old 07-20-2011, 12:32 AM Thread Starter
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i am not sure the thickness of the glass, it is pretty thick. i think it is a hagan tank, maybe, it has black silicon. when i looked it up online it says 6 mm thick glass.

edited to add: yup, 6 mm. i just measured and, i am pretty sure it is this hagan tank http://www.hagen.com/canada/english/...01029700010101
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post #12 of 31 (permalink) Old 07-29-2011, 11:16 AM
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demonr6: Can you tell us what those plastic pieces came from? I've never seen them before. Are they designed for aquariums specifically? Can I buy them in a store? More info please!

Thanks ;-)
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post #13 of 31 (permalink) Old 07-29-2011, 01:02 PM
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Nice tank. I wish they carried that tank here.

Have you seen ADA's garden hooks. You can use those and a glass lid and mostly preserve the clean rimless look that you paid extra for in the first place.


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post #14 of 31 (permalink) Old 07-29-2011, 04:54 PM
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I have used DIY plexiglass lids atop my tanks before and my only caution is to tell you this..

If you are gonna use plexi, do as kamikazi says and get a thick piece. 1/4 inch, (what I foolishly used because I was cheap and it is easy to work with) will bend and warp in no time. A thicker piece is going to resist that much better though.

You could also use lexan (a bit pricier but same lightweight/high strength properties) or you can just get a piece of glass cut to size. Glass is what I use now. Would never go back.
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post #15 of 31 (permalink) Old 07-29-2011, 07:39 PM
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I have bought big pictures from Goodwill before and used the glass to make aquarium lids.


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