Does anyone know off-hand.... - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 05-22-2019, 11:16 PM Thread Starter
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Does anyone know off-hand....

What the deflection of the front and back of a fully-filled Aqueon 40g breeder is? I'm preparing to cut glass panes to rest inside the factory rim and need to know if I should worry about the deflection at the top for dimensional purposes.

Or, can anyone measure theirs for me? I would just need the dimension of the inside of the rim at the end and in the middle. I can't measure mine because it's not filled yet.

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post #2 of 8 (permalink) Old 05-23-2019, 12:43 AM
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I have no idea what brand my 40B is but from front to back, measured inside the plastic rim (the "wall" of the rim above the horizontal lip) it is 17 3/16" at the ends, and 17 7/16" in the middle. So a full 1/4" wider in the middle. The horizontal lip itself is 3/8" wide though, so I think you would be safe to go with a rectangular piece that fits tighter at the ends but would still completely cover the opening in the middle. I'm sure that's the approach commercial glass tops take.
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post #3 of 8 (permalink) Old 05-24-2019, 03:45 AM Thread Starter
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Originally Posted by MichaelBrock View Post
I have no idea what brand my 40B is but from front to back, measured inside the plastic rim (the "wall" of the rim above the horizontal lip) it is 17 3/16" at the ends, and 17 7/16" in the middle. So a full 1/4" wider in the middle. The horizontal lip itself is 3/8" wide though, so I think you would be safe to go with a rectangular piece that fits tighter at the ends but would still completely cover the opening in the middle. I'm sure that's the approach commercial glass tops take.
Thanks kind stranger! If anyone else wants to chime in with theirs, it would be nice to get a few and average them. I think the lip on mine is around that same size so you're probably right, especially considering that the commercial glass tops don't usually account for the difference either.

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post #4 of 8 (permalink) Old 05-31-2019, 04:49 PM
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Aqueon makes a nice lid for the tank but I'm curious if your getting tempered glass with sanded edges ? I need some for my 120 and 125

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post #5 of 8 (permalink) Old 05-31-2019, 10:16 PM
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It might be too late, but I definitely have an Aqueon 40B:





(My screen cover narrows a bit in the middle.)
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post #6 of 8 (permalink) Old 06-02-2019, 02:59 PM Thread Starter
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It might be too late, but I definitely have an Aqueon 40B:





(My screen cover narrows a bit in the middle.)
Super, from what you and Michael have posted I don't believe it will be much of an issue.

And for your question Aku, I'm sending the dimensions to a local glass cutting outfit for some tempered glass panes with polished edges. Two total, identical irregular hexagons. "Irregular hexagons" is somewhat misleading, although technically correct. Basically two rectangles with the corners cut off on one side to allow for plumbing. With both together, it looks a bit like this:



I'm going to 3D print some triangular clip-on covers for whichever openings I end up not using (at least, if I can get my 3D printer working again).

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post #7 of 8 (permalink) Old 06-02-2019, 03:15 PM
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I like these alot but do you think it's ok for o2 exchange.
I run a dehumidifier in my nano fish room but I want to get some like this for my 125 display in the living space.

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post #8 of 8 (permalink) Old 06-03-2019, 03:17 AM Thread Starter
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Originally Posted by Aku Sakana View Post
I like these alot but do you think it's ok for o2 exchange.
I run a dehumidifier in my nano fish room but I want to get some like this for my 125 display in the living space.

Sent from my SM-N910T3 using Tapatalk
This is just for the display tank. It is going to have a sump/refugium/algae scrubber in a 20g long tank in the cabinet below, so not too worried about O2 exchange.

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