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Old 03-02-2014, 01:55 PM   #71
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Trying to decide what kind of overflow pipe to do... Herbie method or durso ?

Any thoughts?

My pump will put out about 4500 gph
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Old 03-02-2014, 03:54 PM   #72
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My 2pence

Quote:
Originally Posted by dmolavi View Post
No yes and yes.

If that over holds say 5 gallons of water, thats 40lbs supported by the silicone seams and the bottom panel. Granted the center of mass is well supported overall, but you create a line of stress where the stand stops supporting the tank. Under a static load condition, it should be o.k. but as engineer, i prefer to err on the side of caution.

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Standard silicone at 24' typically breaks at 10 kn/m2, that's about 208 lbs/ft2.
High strengths are available. It's a compressive load so the glass thickness should be taken into account (tensile strength)
(That's why the bottom doesn't crack in my tank)
If you apply that force of 40lbs over the area concerned the results are quite minimal. Off axis loading will be more apparent in this situation so shear strength will be the governing factor. The stress line will in some part be absorbed by the elasticity of the silicone.
(That's why the sides don't burst out in my tank!)

(My tank)
750 litres 198 us liquid that's 1650lbs roughly +substrate and rocks @550lbs.
Crack free, burst free, fish keeping happiness.

Gee I hope that's right!
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Old 03-02-2014, 04:00 PM   #73
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Quote:
Originally Posted by J.Mcpeak View Post
Standard silicone at 24' typically breaks at 10 kn/m2, that's about 208 lbs/ft2.

High strengths are available. It's a compressive load so the glass thickness should be taken into account (tensile strength)

(That's why the bottom doesn't crack in my tank)

If you apply that force of 40lbs over the area concerned the results are quite minimal. Off axis loading will be more apparent in this situation so shear strength will be the governing factor. The stress line will in some part be absorbed by the elasticity of the silicone.

(That's why the sides don't burst out in my tank!)



(My tank)

750 litres 198 us liquid that's 1650lbs roughly +substrate and rocks @550lbs.

Crack free, burst free, fish keeping happiness.



Gee I hope that's right!

I use Dow Corning 995 structural silicone adhesive... It's strong stuff.

Same stuff I used on my 800 gallon tank
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Old 03-02-2014, 04:11 PM   #74
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Quote:
Originally Posted by audifusion View Post
I use Dow Corning 995 structural silicone adhesive... It's strong stuff.

Same stuff I used on my 800 gallon tank
Right, so the main concern should be can the glass take it? I would think yes. If you consider what loads are applied to a standard 6mm base panel. I would think 40lb of water is a rest break!

I was a glazier for ten years, silicone is unbelievable! 800g! That's for me that is! Maybe next week huh.
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Old 03-11-2014, 10:47 AM   #75
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Tank is almost full of rodi water now, aqua scape finished, seeded the aragonite with sand from my established tank.

Will be putting in 50-100lbs of live rock from my other tanks sump into this one so I don't have to cycle it .
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Old 03-11-2014, 10:40 PM   #76
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Plumbing done, pump on, Click image for larger version

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Just have to mount my led light and I'm good to go
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Old 03-12-2014, 09:25 AM   #77
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I like the rock scape you did it looks sharp.
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Old 03-13-2014, 05:36 PM   #78
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Added 100lbs of live rock(from my other tanks' sump) to my sump.

Salinity is good 1.026, temp 78-79.
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Old 03-14-2014, 07:58 PM   #79
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Can't decide if one light is enough.

Hard to tell with iPhone cam, comes out really blue Click image for larger version

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Old 03-14-2014, 08:21 PM   #80
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Looks like it would be ok, I'm trusting it's going hang and not stay suspended on scrap wood
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