Making Cube out of 2 x 33G?

[KrazyKuch]

Originally Posted by sphelps

If you keep the tank below 20" tall and do not increase the the length (36") your tank will be fine provided you brace it.

Actual volume has nothing to do with glass thickness, only height increases pressure (m*g*h), however the hydrostatic force created by this pressure will create a bending moment (deflection) and the longer the tank the larger the bending moment, but 36" is fine for 6mm.

No point going overkill on glass thickness, you just loose clarity and add weight.

couldn't have said it better myself

[Der_Iron_Chef]

Cool. Thanks guys. I've separated the two tanks (not a positive experience!), and now I have the fun job of stripping all the old silicone off of it. Let's see if I can actually make this work!

[fortheloveofcrabs]

Seems scary to me... you are doubling the water volume, and upping the pressure behind the glass - trying to push it out. I wouldn't. Just my 2 cents.

[Der_Iron_Chef]

This guy's thread on RC shows that he had a 48" x 72" tank made with 1/2" glass. I'm not sure of the height...I think 20-22". I would think a 36" x 36" tank at a height of 18" would be ok with 1/4" glass.

Everywhere I've read said as long as you don't go above 18", 1/4" glass is ok. But people are makin' me nervous

[Zylumn]

Drew
Nice size tank. I am tagging along. Hope this works as I've will try 2 x 20g 24x24x16. Which makes me wonder isn't a 33 gal 36x12.5x16?? which would make your tank 90g. Sweet setup easy to light. Edit it is 36x12x18"
Kevin

[Der_Iron_Chef]

I will re-measure the height! I thought it was 18", but that was a quick measurement when the tank was still together, etc. I sure hope this works! Was thinking of a 1/2" bottom pane.

[LeeR]

If you haven't already stripped the silicone take some razor blades and get as much of it off as you can, then get some of the original mister clean magic erasers and some water and it takes that grease left over stuff off really well.

[sphelps]

Originally Posted by fortheloveofcrabs

Seems scary to me... you are doubling the water volume, and upping the pressure behind the glass - trying to push it out. I wouldn't. Just my 2 cents.

As stated before volume has nothing to do with pressure, only hieght (pressure = density * hieght * gravity). The only force that pushing outwards on the glass is a hydrostatic force cause by the pressure.

[Der_Iron_Chef]

Originally Posted by Zylumn

Hey Drew how are things progressing. Looking for a bottom piece and do you have the sides cleaned off yet?
Kevin

Hey Kevin...slowly but surely! I must admit, I haven't had as much time lately to devote, but I've also been lazy! I found a product at Wal-Mart called Silicone-be-Gone (or something like that), and it seems to really help to get the silicone residue off, with the help of a little more elbow grease of course.

Have you started your project? Would you still be able to help me drill some holes? That's where I'm stuck ultimately!

Originally Posted by sphelps

As stated before volume has nothing to do with pressure, only hieght (pressure = density * hieght * gravity). The only force that pushing outwards on the glass is a hydrostatic force cause by the pressure.

Excellent, thanks! I am very nervous to have 100G blow out all over the floor of my fourth-floor condominium. I imagine three floors of angry people below. I've heard from many people that height is the determining factor, but there's always that nagging doubt.

[Zylumn]

Drew no problem on drilling the holes. I have a 1.5" d-bit hole saw and I am about 13 of 15 for the good. 20 gallons I found to be the trickiest but the thicker the glass the easier. Drilling a 33 is no problem.

My own project will be starting as soon as I come up with 4 20 gallon tanks. I already have 2 pieces of 1/4" 24x24 for the bottom. So I am going for 24x24x16h 40 gallons and will make an extra one possibly for sale. I haven't determine how I will drill it out whether in the middle or on one back side, I was going to see what you did and how it worked out. You jump first Drew!!! LOL
Kevin