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Old 07-15-2020, 11:37 PM   #1
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Help with a custom-cut lid

I want to do a DIY custom lid for my Aquarium, since I have wonky placements for the filter and other items... I'm thinking of doing polycarbonate or something... but I'm seeing possible issues with warping and/or bowing due to temp.
Would a 1/4 inch thick piece of poly hold up decent on a 24 x 12 format?
What other issues do I need to know or worry about?
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Old 07-16-2020, 06:52 PM   #2
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I've seen some comments, in internet searches for the project, that they experienced a lot of warping/bowing with the combination of the light systems and water temp compared to that of the room. I would do glass, but I'm concerned with having trouble getting the various cutouts to work right, or possibly end up cracking the plate while trying to do them.
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Old 07-16-2020, 08:45 PM   #3
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The poly will warp, you can use eggcrate or get a sheet of 1/2" acrylic and it to fit. You could use thinner acrylic but you'll need clips to keep it from lifting.
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Old 07-16-2020, 08:58 PM   #4
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I'm not sure if I have the stuff to cut a sheet that thick, and have it turn out decent; any other thoughts on lid ideas? Due to the tank location, I have to do a custom cut option, of some type, since my filter and other components cannot sit on the back edge (there isn't the needed space available) so I have them on the sidesbut toward the back.
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Old 07-16-2020, 08:59 PM   #5
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Do you have a jig saw?
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Old 07-16-2020, 10:02 PM   #6
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Do you have a jig saw?
Yes, I would need to work out a good place to USE it, but I have one, I'd also probably need to go get some new finer toothed blades, since I bet the ones I have are not ideal.
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Old 07-17-2020, 01:50 AM   #7
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The poly will warp, you can use eggcrate or get a sheet of 1/2" acrylic and it to fit. You could use thinner acrylic but you'll need clips to keep it from lifting.
OK, I've done some quick looking for acrylic sheets, the 1/2" is tough to find in the right size(looking at 12x24 so I can just trim it down and it's close to the right size for the tank; I'll need to cut off about a half inch in each dimension), and seems a little pricey.

Would 3/8" thick be workable to hold shape? It seems a fair bit easier to get hold of, and much nicer on the cost end as well.
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Old 07-17-2020, 08:09 AM   #8
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You can use 3/8", you can get clips to.pin corners and prevent bowing/distorting.
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